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Concave function

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is a concave function. In the case of thermodynamic entropy, without phase transition, entropy as a function of extensive variables is strictly concave. If the system can undergo phase transition, and if it is allowed to split into two subsystems of different phase
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A cubic function is concave (left half) when its first derivative (red) is monotonically decreasing i.e. its second derivative (orange) is negative, and convex (right half) when its first derivative is monotonically increasing i.e. its second derivative is
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is one for which the value at any convex combination of elements in the domain is greater than or equal to the convex combination of the values at the endpoints. Equivalently, a concave function is any function for which the
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in the interior of the domain of a function, the function must be concave; as a partial converse, if the derivative of a strictly concave function is zero at some point, then that point is a local maximum.
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of entropy without phase separation; therefore, the entropy of a system including phase separation will be non-strictly concave.
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Callen, Herbert B.; Callen, Herbert B. (1985). "8.1: Intrinsic Stability of Thermodynamic Systems".
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of two concave functions, i.e. the set of concave functions on a given domain form a
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is convex. The class of concave functions is in a sense the opposite of the class of
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are usually assumed to be concave over some or all of their domains, resulting in
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on that interval, that is, a concave function has a non-increasing (decreasing)
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is both concave and convex, but neither strictly-concave nor strictly-convex.
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is concave and differentiable, then it is bounded above by its first-order
910: 906: 113: 2453: 2337:. Mathematical and Computational Biology Series. Chapman & Hall/ CRC. 4116: 4111: 3995: 2743: 2685: 2362: 2198: 1136:{\displaystyle f\left({\frac {x+y}{2}}\right)\geq {\frac {f(x)+f(y)}{2}}} 407:{\displaystyle f((1-\alpha )x+\alpha y)>(1-\alpha )f(x)+\alpha f(y)\,} 33: 295:{\displaystyle f((1-\alpha )x+\alpha y)\geq (1-\alpha )f(x)+\alpha f(y)} 4039: 4009: 3771: 3460: 3392: 3146: 3019: 2883: 2873: 2816: 1350:{\displaystyle f(tx)=f(tx+(1-t)\cdot 0)\geq tf(x)+(1-t)f(0)\geq tf(x).} 854: 109: 2429: 2412: 3654: 3402: 3397: 2708: 1919: 1683: 2519: 4048: 3649: 3151: 2677: 3829: 3500: 2753: 1678:
The sum of two concave functions is itself concave and so is the
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is strictly concave, but the converse is not true, as shown by
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Gradshteyn, I. S.; Ryzhik, I. M.; Hays, D. F. (1976-07-01).
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are concave on their domains, as their second derivatives
2605:(Second ed.). Palgrave Macmillan. pp. 815–816. 2570:
Thermodynamics and an introduction to thermostatistics
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computation of radiowave attenuation in the atmosphere
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concave function will have at most one global maximum.
520:, this second definition merely states that for every 2173: 2122: 2087: 2036: 2003: 1971: 1928: 1808: 1769: 1724: 1409: 1365: 1220: 1170: 1064: 956: 763: 739: 688: 647: 627: 586: 566: 546: 526: 490: 461: 423: 318: 207: 166: 146: 126: 90: 2544:
Mathematics for Economists: An Introductory Textbook
2410: 2572:(2nd ed.). New York: Wiley. pp. 203–206. 2189: 2159: 2105: 2066: 2016: 1989: 1957: 1907: 1837: 1794: 1755: 1636: 1395: 1349: 1188: 1135: 1021: 811: 745: 715: 674: 633: 613: 572: 552: 532: 512: 473: 447: 406: 294: 190: 152: 132: 96: 836: 4155: 2507:SIAM Journal on Matrix Analysis and Applications 2367:(3rd ed.). New York: Norton. p. 489. 2360: 2332: 641:is above the straight line joining the points 513:{\displaystyle f:\mathbb {R} \to \mathbb {R} } 3728: 2662: 2630:Engineering Optimization: Theory and Practice 2603:The New Palgrave Dictionary of Economics 2547:. Oxford University Press. pp. 363–364. 875:where concavity changes (between concave and 2567: 2540: 2335:Optimal Control Applied to Biological Models 806: 779: 2500: 1649: 3735: 3721: 2669: 2655: 2541:Pemberton, Malcolm; Rau, Nicholas (2015). 2486:: CS1 maint: location missing publisher ( 2451: 2413:"Table of Integrals, Series, and Products" 1908:{\textstyle g''(x)=-{\frac {1}{4x^{3/2}}}} 757:if the upper contour sets of the function 3697:Regiomontanus' angle maximization problem 2494: 2428: 1045:it is midpoint concave, that is, for any 506: 498: 403: 3540: 2596: 826: 3825:Locally convex topological vector space 3045:Differentiating under the integral sign 14: 4156: 3716: 2921:Inverse functions and differentiation 2650: 2590: 2395: 812:{\displaystyle S(a)=\{x:f(x)\geq a\}} 2632:. John Wiley and Sons. p. 779. 2356: 2354: 2333:Lenhart, S.; Workman, J. T. (2007). 2081:function is concave on the interval 2627: 1022:{\displaystyle f(y)\leq f(x)+f'(x)} 24: 2719:Free variables and bound variables 2024:is a strictly decreasing function. 1981: 1396:{\displaystyle a,b\in [0,\infty )} 1387: 1180: 25: 4180: 3524:The Method of Mechanical Theorems 2417:Journal of Lubrication Technology 2351: 3079:Partial fractions in integration 2995:Stochastic differential equation 2304:Logarithmically concave function 1795:{\displaystyle g(x)={\sqrt {x}}} 1700:of a concave function is also a 726: 448:{\displaystyle \alpha \in (0,1)} 3930:Ekeland's variational principle 3217:Jacobian matrix and determinant 3072:Tangent half-angle substitution 3040:Fundamental theorem of calculus 2212: 3293:Arithmetico-geometric sequence 2985:Ordinary differential equation 2561: 2534: 2445: 2404: 2389: 2326: 2183: 2175: 2153: 2145: 2132: 2126: 2100: 2088: 2046: 2040: 2017:{\displaystyle {\frac {1}{x}}} 1984: 1972: 1938: 1932: 1866: 1860: 1823: 1817: 1779: 1773: 1734: 1728: 1631: 1619: 1610: 1598: 1571: 1559: 1509: 1497: 1460: 1448: 1434: 1428: 1419: 1413: 1390: 1378: 1341: 1335: 1323: 1317: 1311: 1299: 1293: 1287: 1275: 1266: 1254: 1242: 1233: 1224: 1183: 1171: 1124: 1118: 1109: 1103: 1016: 1004: 1001: 995: 981: 975: 966: 960: 837:Functions of a single variable 797: 791: 773: 767: 710: 707: 701: 689: 669: 666: 660: 648: 608: 605: 599: 587: 502: 442: 430: 400: 394: 382: 376: 370: 358: 352: 337: 325: 322: 289: 283: 271: 265: 259: 247: 241: 226: 214: 211: 185: 173: 13: 1: 3116:Integro-differential equation 2990:Partial differential equation 2319: 2160:{\displaystyle f(B)=\log |B|} 1958:{\displaystyle f(x)=\log {x}} 1663:is concave over a convex set 822: 76: 49:. A concave function is also 27:Negative of a convex function 2676: 2452:Hass, Joel (13 March 2017). 2241:decision makers are concave. 1033:Lebesgue measurable function 849:is (strictly) concave on an 160:in the interval and for any 7: 3950:Hermite–Hadamard inequality 3270:Generalized Stokes' theorem 3057:Integration by substitution 2287: 2203:nonnegative-definite matrix 1990:{\displaystyle (0,\infty )} 1756:{\displaystyle f(x)=-x^{2}} 1712: 1189:{\displaystyle [0,\infty )} 191:{\displaystyle \alpha \in } 10: 4185: 2799:(Δ, ÎŽ)-definition of limit 2628:Rao, Singiresu S. (2009). 2611:10.1057/9780230226203.1375 2222:involve concave functions. 4135: 4102: 4057: 3988: 3914: 3838: 3780: 3754: 3692:Proof that 22/7 exceeds π 3629: 3607: 3533: 3481:Gottfried Wilhelm Leibniz 3451: 3428:e (mathematical constant) 3413: 3285: 3192: 3124: 3005: 2807: 2762: 2684: 2067:{\displaystyle f(x)=ax+b} 1965:is concave on its domain 1838:{\displaystyle f''(x)=-2} 909:(or, informally, if the " 4136:Applications and related 3940:Fenchel-Young inequality 3443:Stirling's approximation 2916:Implicit differentiation 2864:Rules of differentiation 2597:Crouzeix, J.-P. (2008). 2231:choice under uncertainty 863:monotonically decreasing 716:{\displaystyle (y,f(y))} 675:{\displaystyle (x,f(x))} 614:{\displaystyle (z,f(z))} 3896:Legendre transformation 3820:Legendre transformation 3677:Euler–Maclaurin formula 3582:trigonometric functions 3035:Constant of integration 2361:Varian, Hal R. (1992). 913:" is non-positive). If 844:differentiable function 474:{\displaystyle x\neq y} 108:(or, more generally, a 4143:Convexity in economics 4077:(lower) ideally convex 3935:Fenchel–Moreau theorem 3925:CarathĂ©odory's theorem 3646:Differential geometry 3491:Infinitesimal calculus 3194:Multivariable calculus 3142:Directional derivative 2948:Second derivative test 2926:Logarithmic derivative 2899:General Leibniz's rule 2794:Order of approximation 2396:Rudin, Walter (1976). 2364:Microeconomic analysis 2191: 2161: 2107: 2068: 2018: 1991: 1959: 1909: 1839: 1796: 1757: 1638: 1397: 1351: 1190: 1137: 1023: 833: 813: 747: 717: 676: 635: 615: 574: 554: 534: 514: 475: 449: 408: 296: 192: 154: 134: 98: 4065:Convex series related 3965:Shapley–Folkman lemma 3565:logarithmic functions 3560:exponential functions 3476:Generality of algebra 3354:Tests of convergence 2980:Differential equation 2964:Further applications 2953:Extreme value theorem 2943:First derivative test 2837:Differential operator 2809:Differential calculus 2309:Quasiconcave function 2192: 2162: 2108: 2069: 2019: 1992: 1960: 1910: 1840: 1797: 1758: 1639: 1398: 1352: 1191: 1138: 1024: 830: 814: 748: 718: 677: 636: 616: 575: 555: 535: 515: 476: 450: 409: 305:A function is called 297: 193: 155: 135: 99: 3955:Krein–Milman theorem 3748:variational analysis 3630:Miscellaneous topics 3570:hyperbolic functions 3555:irrational functions 3433:Exponential function 3286:Sequences and series 3052:Integration by parts 2250:production functions 2246:microeconomic theory 2218:Rays bending in the 2171: 2120: 2085: 2034: 2001: 1997:, as its derivative 1969: 1926: 1915:are always negative. 1849: 1806: 1767: 1722: 1407: 1363: 1218: 1168: 1062: 954: 948:Taylor approximation 761: 737: 686: 645: 625: 584: 564: 544: 524: 488: 459: 421: 316: 205: 164: 144: 124: 88: 3945:Jensen's inequality 3815:Lagrange multiplier 3805:Convex optimization 3800:Convex metric space 3617:List of derivatives 3453:History of calculus 3368:Cauchy condensation 3265:Exterior derivative 3222:Lagrange multiplier 2958:Maximum and minimum 2789:Limit of a sequence 2777:Limit of a function 2724:Graph of a function 2704:Continuous function 2299:Jensen's inequality 2254:diminishing returns 2190:{\displaystyle |B|} 853:if and only if its 4169:Types of functions 4073:(cs, bcs)-complete 4044:Algebraic interior 3762:Convex combination 3550:rational functions 3517:Method of Fluxions 3363:Alternating series 3260:Differential forms 3242:Partial derivative 3202:Divergence theorem 3084:Quadratic integral 2852:Leibniz's notation 2842:Mean value theorem 2827:Partial derivative 2772:Indeterminate form 2591:Further References 2265:Information Theory 2187: 2157: 2103: 2064: 2014: 1987: 1955: 1905: 1835: 1792: 1753: 1634: 1393: 1347: 1186: 1133: 1019: 834: 809: 743: 713: 672: 631: 611: 570: 550: 530: 510: 471: 445: 404: 292: 188: 150: 130: 94: 4151: 4150: 3710: 3709: 3636:Complex calculus 3625: 3624: 3506:Law of Continuity 3438:Natural logarithm 3423:Bernoulli numbers 3414:Special functions 3373:Direct comparison 3237:Multiple integral 3111:Integral equation 3007:Integral calculus 2938:Stationary points 2912:Other techniques 2857:Newton's notation 2822:Second derivative 2714:Finite difference 2639:978-0-470-18352-6 2620:978-0-333-78676-5 2599:"Quasi-concavity" 2579:978-0-471-86256-7 2554:978-1-78499-148-7 2465:978-0-13-443898-6 2430:10.1115/1.3452897 2344:978-1-58488-640-2 2256:to input factors. 2012: 1903: 1790: 1680:pointwise minimum 1593: 1554: 1528: 1479: 1131: 1088: 881:inflection points 819:are convex sets. 746:{\displaystyle f} 634:{\displaystyle f} 573:{\displaystyle y} 553:{\displaystyle x} 540:strictly between 533:{\displaystyle z} 153:{\displaystyle y} 133:{\displaystyle x} 97:{\displaystyle f} 55:concave downwards 18:Concave functions 16:(Redirected from 4176: 4069:(cs, lcs)-closed 4015:Effective domain 3970:Robinson–Ursescu 3846:Convex conjugate 3737: 3730: 3723: 3714: 3713: 3640:Contour integral 3538: 3537: 3388:Limit comparison 3297:Types of series 3256:Advanced topics 3247:Surface integral 3091:Trapezoidal rule 3030:Basic properties 3025:Riemann integral 2973:Taylor's theorem 2699:Concave function 2694:Binomial theorem 2671: 2664: 2657: 2648: 2647: 2643: 2624: 2584: 2583: 2565: 2559: 2558: 2538: 2532: 2531: 2502:Cover, Thomas M. 2498: 2492: 2491: 2485: 2477: 2455:Thomas' calculus 2449: 2443: 2442: 2432: 2408: 2402: 2401: 2393: 2387: 2386: 2358: 2349: 2348: 2330: 2274:phase separation 2235:cardinal utility 2227:expected utility 2196: 2194: 2193: 2188: 2186: 2178: 2166: 2164: 2163: 2158: 2156: 2148: 2112: 2110: 2109: 2106:{\displaystyle } 2104: 2073: 2071: 2070: 2065: 2023: 2021: 2020: 2015: 2013: 2005: 1996: 1994: 1993: 1988: 1964: 1962: 1961: 1956: 1954: 1914: 1912: 1911: 1906: 1904: 1902: 1901: 1900: 1896: 1876: 1859: 1844: 1842: 1841: 1836: 1816: 1801: 1799: 1798: 1793: 1791: 1786: 1762: 1760: 1759: 1754: 1752: 1751: 1670: 1662: 1643: 1641: 1640: 1635: 1594: 1592: 1578: 1555: 1553: 1539: 1534: 1530: 1529: 1527: 1513: 1485: 1481: 1480: 1478: 1464: 1402: 1400: 1399: 1394: 1356: 1354: 1353: 1348: 1213: 1206: 1202: 1195: 1193: 1192: 1187: 1159: 1155: 1149:is concave, and 1148: 1142: 1140: 1139: 1134: 1132: 1127: 1098: 1093: 1089: 1084: 1073: 1058: 1052: 1048: 1040: 1028: 1026: 1025: 1020: 994: 945: 938: 924: 916: 915:f ′′ 904: 903:f ′′ 897: 889: 860: 848: 818: 816: 815: 810: 752: 750: 749: 744: 730: 722: 720: 719: 714: 681: 679: 678: 673: 640: 638: 637: 632: 621:on the graph of 620: 618: 617: 612: 579: 577: 576: 571: 559: 557: 556: 551: 539: 537: 536: 531: 519: 517: 516: 511: 509: 501: 480: 478: 477: 472: 454: 452: 451: 446: 413: 411: 410: 405: 307:strictly concave 301: 299: 298: 293: 197: 195: 194: 189: 159: 157: 156: 151: 139: 137: 136: 131: 116:) is said to be 103: 101: 100: 95: 47:convex functions 38:concave function 21: 4184: 4183: 4179: 4178: 4177: 4175: 4174: 4173: 4164:Convex analysis 4154: 4153: 4152: 4147: 4131: 4098: 4053: 3984: 3910: 3901:Semi-continuity 3886:Convex function 3867:Logarithmically 3834: 3795:Convex geometry 3776: 3767:Convex function 3750: 3744:Convex analysis 3741: 3711: 3706: 3702:Steinmetz solid 3687:Integration Bee 3621: 3603: 3529: 3471:Colin Maclaurin 3447: 3415: 3409: 3281: 3275:Tensor calculus 3252:Volume integral 3188: 3163:Basic theorems 3126:Vector calculus 3120: 3001: 2968:Newton's method 2803: 2782:One-sided limit 2758: 2739:Rolle's theorem 2729:Linear function 2680: 2675: 2640: 2621: 2593: 2588: 2587: 2580: 2566: 2562: 2555: 2539: 2535: 2520:10.1137/0609033 2499: 2495: 2479: 2478: 2466: 2450: 2446: 2409: 2405: 2394: 2390: 2375: 2359: 2352: 2345: 2331: 2327: 2322: 2314:Concavification 2294:Concave polygon 2290: 2284: 2278:convex envelope 2215: 2182: 2174: 2172: 2169: 2168: 2152: 2144: 2121: 2118: 2117: 2086: 2083: 2082: 2035: 2032: 2031: 2029:affine function 2004: 2002: 1999: 1998: 1970: 1967: 1966: 1950: 1927: 1924: 1923: 1892: 1888: 1884: 1880: 1875: 1852: 1850: 1847: 1846: 1809: 1807: 1804: 1803: 1785: 1768: 1765: 1764: 1747: 1743: 1723: 1720: 1719: 1715: 1673:convex function 1668: 1660: 1656: 1582: 1577: 1543: 1538: 1517: 1512: 1496: 1492: 1468: 1463: 1447: 1443: 1408: 1405: 1404: 1364: 1361: 1360: 1219: 1216: 1215: 1208: 1204: 1203:is concave and 1200: 1169: 1166: 1165: 1157: 1150: 1146: 1099: 1097: 1074: 1072: 1068: 1063: 1060: 1059: 1054: 1050: 1046: 1036: 1035:on an interval 987: 955: 952: 951: 943: 926: 922: 914: 902: 895: 887: 858: 846: 839: 825: 762: 759: 758: 738: 735: 734: 687: 684: 683: 646: 643: 642: 626: 623: 622: 585: 582: 581: 565: 562: 561: 545: 542: 541: 525: 522: 521: 505: 497: 489: 486: 485: 484:For a function 460: 457: 456: 422: 419: 418: 317: 314: 313: 206: 203: 202: 165: 162: 161: 145: 142: 141: 125: 122: 121: 89: 86: 85: 79: 28: 23: 22: 15: 12: 11: 5: 4182: 4172: 4171: 4166: 4149: 4148: 4146: 4145: 4139: 4137: 4133: 4132: 4130: 4129: 4124: 4122:Strong duality 4119: 4114: 4108: 4106: 4100: 4099: 4097: 4096: 4061: 4059: 4055: 4054: 4052: 4051: 4046: 4037: 4032: 4030:John ellipsoid 4027: 4022: 4017: 4012: 3998: 3992: 3990: 3986: 3985: 3983: 3982: 3977: 3972: 3967: 3962: 3957: 3952: 3947: 3942: 3937: 3932: 3927: 3921: 3919: 3917:results (list) 3912: 3911: 3909: 3908: 3903: 3898: 3893: 3891:Invex function 3888: 3879: 3874: 3869: 3864: 3859: 3853: 3848: 3842: 3840: 3836: 3835: 3833: 3832: 3827: 3822: 3817: 3812: 3807: 3802: 3797: 3792: 3790:Choquet theory 3786: 3784: 3778: 3777: 3775: 3774: 3769: 3764: 3758: 3756: 3755:Basic concepts 3752: 3751: 3740: 3739: 3732: 3725: 3717: 3708: 3707: 3705: 3704: 3699: 3694: 3689: 3684: 3682:Gabriel's horn 3679: 3674: 3673: 3672: 3667: 3662: 3657: 3652: 3644: 3643: 3642: 3633: 3631: 3627: 3626: 3623: 3622: 3620: 3619: 3614: 3612:List of limits 3608: 3605: 3604: 3602: 3601: 3600: 3599: 3594: 3589: 3579: 3578: 3577: 3567: 3562: 3557: 3552: 3546: 3544: 3535: 3531: 3530: 3528: 3527: 3520: 3513: 3511:Leonhard Euler 3508: 3503: 3498: 3493: 3488: 3483: 3478: 3473: 3468: 3463: 3457: 3455: 3449: 3448: 3446: 3445: 3440: 3435: 3430: 3425: 3419: 3417: 3411: 3410: 3408: 3407: 3406: 3405: 3400: 3395: 3390: 3385: 3380: 3375: 3370: 3365: 3360: 3352: 3351: 3350: 3345: 3344: 3343: 3338: 3328: 3323: 3318: 3313: 3308: 3303: 3295: 3289: 3287: 3283: 3282: 3280: 3279: 3278: 3277: 3272: 3267: 3262: 3254: 3249: 3244: 3239: 3234: 3229: 3224: 3219: 3214: 3212:Hessian matrix 3209: 3204: 3198: 3196: 3190: 3189: 3187: 3186: 3185: 3184: 3179: 3174: 3169: 3167:Line integrals 3161: 3160: 3159: 3154: 3149: 3144: 3139: 3130: 3128: 3122: 3121: 3119: 3118: 3113: 3108: 3107: 3106: 3101: 3093: 3088: 3087: 3086: 3076: 3075: 3074: 3069: 3064: 3054: 3049: 3048: 3047: 3037: 3032: 3027: 3022: 3017: 3015:Antiderivative 3011: 3009: 3003: 3002: 3000: 2999: 2998: 2997: 2992: 2987: 2977: 2976: 2975: 2970: 2962: 2961: 2960: 2955: 2950: 2945: 2935: 2934: 2933: 2928: 2923: 2918: 2910: 2909: 2908: 2903: 2902: 2901: 2891: 2886: 2881: 2876: 2871: 2861: 2860: 2859: 2854: 2844: 2839: 2834: 2829: 2824: 2819: 2813: 2811: 2805: 2804: 2802: 2801: 2796: 2791: 2786: 2785: 2784: 2774: 2768: 2766: 2760: 2759: 2757: 2756: 2751: 2746: 2741: 2736: 2731: 2726: 2721: 2716: 2711: 2706: 2701: 2696: 2690: 2688: 2682: 2681: 2674: 2673: 2666: 2659: 2651: 2645: 2644: 2638: 2625: 2619: 2592: 2589: 2586: 2585: 2578: 2560: 2553: 2533: 2514:(3): 384–392. 2493: 2464: 2444: 2403: 2400:. p. 101. 2388: 2373: 2350: 2343: 2324: 2323: 2321: 2318: 2317: 2316: 2311: 2306: 2301: 2296: 2289: 2286: 2282: 2281: 2261:Thermodynamics 2257: 2242: 2223: 2214: 2211: 2210: 2209: 2185: 2181: 2177: 2155: 2151: 2147: 2143: 2140: 2137: 2134: 2131: 2128: 2125: 2114: 2102: 2099: 2096: 2093: 2090: 2075: 2063: 2060: 2057: 2054: 2051: 2048: 2045: 2042: 2039: 2025: 2011: 2008: 1986: 1983: 1980: 1977: 1974: 1953: 1949: 1946: 1943: 1940: 1937: 1934: 1931: 1916: 1899: 1895: 1891: 1887: 1883: 1879: 1874: 1871: 1868: 1865: 1862: 1858: 1855: 1834: 1831: 1828: 1825: 1822: 1819: 1815: 1812: 1789: 1784: 1781: 1778: 1775: 1772: 1750: 1746: 1742: 1739: 1736: 1733: 1730: 1727: 1718:The functions 1714: 1711: 1710: 1709: 1702:global maximum 1694: 1689:Near a strict 1687: 1676: 1665:if and only if 1655: 1648: 1647: 1646: 1645: 1644: 1633: 1630: 1627: 1624: 1621: 1618: 1615: 1612: 1609: 1606: 1603: 1600: 1597: 1591: 1588: 1585: 1581: 1576: 1573: 1570: 1567: 1564: 1561: 1558: 1552: 1549: 1546: 1542: 1537: 1533: 1526: 1523: 1520: 1516: 1511: 1508: 1505: 1502: 1499: 1495: 1491: 1488: 1484: 1477: 1474: 1471: 1467: 1462: 1459: 1456: 1453: 1450: 1446: 1442: 1439: 1436: 1433: 1430: 1427: 1424: 1421: 1418: 1415: 1412: 1392: 1389: 1386: 1383: 1380: 1377: 1374: 1371: 1368: 1357: 1346: 1343: 1340: 1337: 1334: 1331: 1328: 1325: 1322: 1319: 1316: 1313: 1310: 1307: 1304: 1301: 1298: 1295: 1292: 1289: 1286: 1283: 1280: 1277: 1274: 1271: 1268: 1265: 1262: 1259: 1256: 1253: 1250: 1247: 1244: 1241: 1238: 1235: 1232: 1229: 1226: 1223: 1185: 1182: 1179: 1176: 1173: 1145:If a function 1143: 1130: 1126: 1123: 1120: 1117: 1114: 1111: 1108: 1105: 1102: 1096: 1092: 1087: 1083: 1080: 1077: 1071: 1067: 1043:if and only if 1029: 1018: 1015: 1012: 1009: 1006: 1003: 1000: 997: 993: 990: 986: 983: 980: 977: 974: 971: 968: 965: 962: 959: 940: 900:if and only if 892:differentiable 884: 870: 861:is (strictly) 838: 835: 824: 821: 808: 805: 802: 799: 796: 793: 790: 787: 784: 781: 778: 775: 772: 769: 766: 742: 712: 709: 706: 703: 700: 697: 694: 691: 671: 668: 665: 662: 659: 656: 653: 650: 630: 610: 607: 604: 601: 598: 595: 592: 589: 569: 549: 529: 508: 504: 500: 496: 493: 470: 467: 464: 444: 441: 438: 435: 432: 429: 426: 415: 414: 402: 399: 396: 393: 390: 387: 384: 381: 378: 375: 372: 369: 366: 363: 360: 357: 354: 351: 348: 345: 342: 339: 336: 333: 330: 327: 324: 321: 303: 302: 291: 288: 285: 282: 279: 276: 273: 270: 267: 264: 261: 258: 255: 252: 249: 246: 243: 240: 237: 234: 231: 228: 225: 222: 219: 216: 213: 210: 187: 184: 181: 178: 175: 172: 169: 149: 129: 93: 81:A real-valued 78: 75: 63:convex upwards 26: 9: 6: 4: 3: 2: 4181: 4170: 4167: 4165: 4162: 4161: 4159: 4144: 4141: 4140: 4138: 4134: 4128: 4125: 4123: 4120: 4118: 4115: 4113: 4110: 4109: 4107: 4105: 4101: 4094: 4092: 4086: 4084: 4078: 4074: 4070: 4066: 4063: 4062: 4060: 4056: 4050: 4047: 4045: 4041: 4038: 4036: 4033: 4031: 4028: 4026: 4023: 4021: 4018: 4016: 4013: 4011: 4007: 4003: 3999: 3997: 3994: 3993: 3991: 3987: 3981: 3978: 3976: 3973: 3971: 3968: 3966: 3963: 3961: 3960:Mazur's lemma 3958: 3956: 3953: 3951: 3948: 3946: 3943: 3941: 3938: 3936: 3933: 3931: 3928: 3926: 3923: 3922: 3920: 3918: 3913: 3907: 3906:Subderivative 3904: 3902: 3899: 3897: 3894: 3892: 3889: 3887: 3883: 3880: 3878: 3875: 3873: 3870: 3868: 3865: 3863: 3860: 3858: 3854: 3852: 3849: 3847: 3844: 3843: 3841: 3837: 3831: 3828: 3826: 3823: 3821: 3818: 3816: 3813: 3811: 3808: 3806: 3803: 3801: 3798: 3796: 3793: 3791: 3788: 3787: 3785: 3783: 3782:Topics (list) 3779: 3773: 3770: 3768: 3765: 3763: 3760: 3759: 3757: 3753: 3749: 3745: 3738: 3733: 3731: 3726: 3724: 3719: 3718: 3715: 3703: 3700: 3698: 3695: 3693: 3690: 3688: 3685: 3683: 3680: 3678: 3675: 3671: 3668: 3666: 3663: 3661: 3658: 3656: 3653: 3651: 3648: 3647: 3645: 3641: 3638: 3637: 3635: 3634: 3632: 3628: 3618: 3615: 3613: 3610: 3609: 3606: 3598: 3595: 3593: 3590: 3588: 3585: 3584: 3583: 3580: 3576: 3573: 3572: 3571: 3568: 3566: 3563: 3561: 3558: 3556: 3553: 3551: 3548: 3547: 3545: 3543: 3539: 3536: 3532: 3526: 3525: 3521: 3519: 3518: 3514: 3512: 3509: 3507: 3504: 3502: 3499: 3497: 3494: 3492: 3489: 3487: 3486:Infinitesimal 3484: 3482: 3479: 3477: 3474: 3472: 3469: 3467: 3464: 3462: 3459: 3458: 3456: 3454: 3450: 3444: 3441: 3439: 3436: 3434: 3431: 3429: 3426: 3424: 3421: 3420: 3418: 3412: 3404: 3401: 3399: 3396: 3394: 3391: 3389: 3386: 3384: 3381: 3379: 3376: 3374: 3371: 3369: 3366: 3364: 3361: 3359: 3356: 3355: 3353: 3349: 3346: 3342: 3339: 3337: 3334: 3333: 3332: 3329: 3327: 3324: 3322: 3319: 3317: 3314: 3312: 3309: 3307: 3304: 3302: 3299: 3298: 3296: 3294: 3291: 3290: 3288: 3284: 3276: 3273: 3271: 3268: 3266: 3263: 3261: 3258: 3257: 3255: 3253: 3250: 3248: 3245: 3243: 3240: 3238: 3235: 3233: 3230: 3228: 3227:Line integral 3225: 3223: 3220: 3218: 3215: 3213: 3210: 3208: 3205: 3203: 3200: 3199: 3197: 3195: 3191: 3183: 3180: 3178: 3175: 3173: 3170: 3168: 3165: 3164: 3162: 3158: 3155: 3153: 3150: 3148: 3145: 3143: 3140: 3138: 3135: 3134: 3132: 3131: 3129: 3127: 3123: 3117: 3114: 3112: 3109: 3105: 3102: 3100: 3099:Washer method 3097: 3096: 3094: 3092: 3089: 3085: 3082: 3081: 3080: 3077: 3073: 3070: 3068: 3065: 3063: 3062:trigonometric 3060: 3059: 3058: 3055: 3053: 3050: 3046: 3043: 3042: 3041: 3038: 3036: 3033: 3031: 3028: 3026: 3023: 3021: 3018: 3016: 3013: 3012: 3010: 3008: 3004: 2996: 2993: 2991: 2988: 2986: 2983: 2982: 2981: 2978: 2974: 2971: 2969: 2966: 2965: 2963: 2959: 2956: 2954: 2951: 2949: 2946: 2944: 2941: 2940: 2939: 2936: 2932: 2931:Related rates 2929: 2927: 2924: 2922: 2919: 2917: 2914: 2913: 2911: 2907: 2904: 2900: 2897: 2896: 2895: 2892: 2890: 2887: 2885: 2882: 2880: 2877: 2875: 2872: 2870: 2867: 2866: 2865: 2862: 2858: 2855: 2853: 2850: 2849: 2848: 2845: 2843: 2840: 2838: 2835: 2833: 2830: 2828: 2825: 2823: 2820: 2818: 2815: 2814: 2812: 2810: 2806: 2800: 2797: 2795: 2792: 2790: 2787: 2783: 2780: 2779: 2778: 2775: 2773: 2770: 2769: 2767: 2765: 2761: 2755: 2752: 2750: 2747: 2745: 2742: 2740: 2737: 2735: 2732: 2730: 2727: 2725: 2722: 2720: 2717: 2715: 2712: 2710: 2707: 2705: 2702: 2700: 2697: 2695: 2692: 2691: 2689: 2687: 2683: 2679: 2672: 2667: 2665: 2660: 2658: 2653: 2652: 2649: 2641: 2635: 2631: 2626: 2622: 2616: 2612: 2608: 2604: 2600: 2595: 2594: 2581: 2575: 2571: 2564: 2556: 2550: 2546: 2545: 2537: 2529: 2525: 2521: 2517: 2513: 2509: 2508: 2503: 2497: 2489: 2483: 2475: 2471: 2467: 2461: 2457: 2456: 2448: 2440: 2436: 2431: 2426: 2422: 2418: 2414: 2407: 2399: 2392: 2384: 2380: 2376: 2374:0-393-95735-7 2370: 2366: 2365: 2357: 2355: 2346: 2340: 2336: 2329: 2325: 2315: 2312: 2310: 2307: 2305: 2302: 2300: 2297: 2295: 2292: 2291: 2285: 2279: 2275: 2270: 2266: 2262: 2258: 2255: 2251: 2247: 2243: 2240: 2237:functions of 2236: 2232: 2228: 2224: 2221: 2217: 2216: 2208:, is concave. 2207: 2204: 2200: 2179: 2149: 2141: 2138: 2135: 2129: 2123: 2116:The function 2115: 2097: 2094: 2091: 2080: 2076: 2061: 2058: 2055: 2052: 2049: 2043: 2037: 2030: 2026: 2009: 2006: 1978: 1975: 1951: 1947: 1944: 1941: 1935: 1929: 1921: 1917: 1897: 1893: 1889: 1885: 1881: 1877: 1872: 1869: 1863: 1856: 1853: 1832: 1829: 1826: 1820: 1813: 1810: 1787: 1782: 1776: 1770: 1748: 1744: 1740: 1737: 1731: 1725: 1717: 1716: 1707: 1703: 1699: 1698:local maximum 1695: 1692: 1691:local maximum 1688: 1685: 1681: 1677: 1675:over the set. 1674: 1667:the function 1666: 1658: 1657: 1653: 1650:Functions of 1628: 1625: 1622: 1616: 1613: 1607: 1604: 1601: 1595: 1589: 1586: 1583: 1579: 1574: 1568: 1565: 1562: 1556: 1550: 1547: 1544: 1540: 1535: 1531: 1524: 1521: 1518: 1514: 1506: 1503: 1500: 1493: 1489: 1486: 1482: 1475: 1472: 1469: 1465: 1457: 1454: 1451: 1444: 1440: 1437: 1431: 1425: 1422: 1416: 1410: 1384: 1381: 1375: 1372: 1369: 1366: 1358: 1344: 1338: 1332: 1329: 1326: 1320: 1314: 1308: 1305: 1302: 1296: 1290: 1284: 1281: 1278: 1272: 1269: 1263: 1260: 1257: 1251: 1248: 1245: 1239: 1236: 1230: 1227: 1221: 1211: 1198: 1197: 1177: 1174: 1163: 1153: 1144: 1128: 1121: 1115: 1112: 1106: 1100: 1094: 1090: 1085: 1081: 1078: 1075: 1069: 1065: 1057: 1044: 1039: 1034: 1030: 1013: 1010: 1007: 998: 991: 988: 984: 978: 972: 969: 963: 957: 949: 941: 937: 933: 929: 920: 912: 908: 901: 893: 885: 882: 878: 874: 871: 868: 864: 856: 852: 845: 841: 840: 829: 820: 803: 800: 794: 788: 785: 782: 776: 770: 764: 756: 740: 731: 729: 724: 704: 698: 695: 692: 663: 657: 654: 651: 628: 602: 596: 593: 590: 567: 547: 527: 494: 491: 482: 468: 465: 462: 439: 436: 433: 427: 424: 397: 391: 388: 385: 379: 373: 367: 364: 361: 355: 349: 346: 343: 340: 334: 331: 328: 319: 312: 311: 310: 308: 286: 280: 277: 274: 268: 262: 256: 253: 250: 244: 238: 235: 232: 229: 223: 220: 217: 208: 201: 200: 199: 182: 179: 176: 170: 167: 147: 127: 119: 115: 111: 107: 91: 84: 74: 72: 68: 64: 60: 56: 52: 48: 44: 39: 35: 30: 19: 4127:Weak duality 4090: 4082: 4002:Orthogonally 3850: 3597:Secant cubed 3522: 3515: 3496:Isaac Newton 3466:Brook Taylor 3133:Derivatives 3104:Shell method 2832:Differential 2698: 2629: 2602: 2569: 2563: 2543: 2536: 2511: 2505: 2496: 2454: 2447: 2420: 2416: 2406: 2397: 2391: 2363: 2334: 2328: 2283: 2213:Applications 2205: 1705: 1651: 1209: 1151: 1055: 1037: 935: 931: 927: 911:acceleration 907:non-positive 755:quasiconcave 732: 725: 580:, the point 483: 416: 306: 304: 120:if, for any 117: 114:vector space 80: 71:upper convex 70: 66: 62: 59:concave down 58: 54: 51:synonymously 37: 31: 29: 4117:Duality gap 4112:Dual system 3996:Convex hull 3665:of surfaces 3416:and numbers 3378:Dirichlet's 3348:Telescoping 3301:Alternating 2889:L'HĂŽpital's 2686:Precalculus 2239:risk averse 2229:theory for 2199:determinant 1659:A function 1162:subadditive 1041:is concave 934:) = − 898:is concave 733:A function 34:mathematics 4158:Categories 4040:Radial set 4010:Convex set 3772:Convex set 3461:Adequality 3147:Divergence 3020:Arc length 2817:Derivative 2423:(3): 479. 2320:References 1207:, letting 855:derivative 823:Properties 110:convex set 77:Definition 67:convex cap 4025:Hypograph 3660:of curves 3655:Curvature 3542:Integrals 3336:Maclaurin 3316:Geometric 3207:Geometric 3157:Laplacian 2869:linearity 2709:Factorial 2482:cite book 2474:965446428 2439:0022-2305 2142:⁡ 2098:π 1982:∞ 1948:⁡ 1922:function 1920:logarithm 1873:− 1830:− 1741:− 1684:semifield 1654:variables 1536:≥ 1388:∞ 1376:∈ 1327:≥ 1306:− 1279:≥ 1270:⋅ 1261:− 1205:1 ≄ t ≄ 0 1196:. Proof: 1181:∞ 1095:≥ 1011:− 970:≤ 890:is twice- 859:f ′ 857:function 801:≥ 503:→ 466:≠ 428:∈ 425:α 389:α 368:α 365:− 347:α 335:α 332:− 278:α 257:α 254:− 245:≥ 236:α 224:α 221:− 171:∈ 168:α 43:hypograph 4049:Zonotope 4020:Epigraph 3650:Manifold 3383:Integral 3326:Infinite 3321:Harmonic 3306:Binomial 3152:Gradient 3095:Volumes 2906:Quotient 2847:Notation 2678:Calculus 2398:Analysis 2383:24847759 2288:See also 2167:, where 1857:″ 1814:″ 1713:Examples 1706:strictly 1214:we have 992:′ 919:negative 851:interval 832:positive 417:for any 106:interval 83:function 4104:Duality 4006:Pseudo- 3980:Ursescu 3877:Pseudo- 3851:Concave 3830:Simplex 3810:Duality 3587:inverse 3575:inverse 3501:Fluxion 3311:Fourier 3177:Stokes' 3172:Green's 2894:Product 2754:Tangent 2528:5491763 2269:Entropy 2197:is the 1156:, then 1154:(0) ≄ 0 894:, then 118:concave 53:called 4087:, and 4058:Series 3975:Simons 3882:Quasi- 3872:Proper 3857:Closed 3670:Tensor 3592:Secant 3358:Abel's 3341:Taylor 3232:Matrix 3182:Gauss' 2764:Limits 2744:Secant 2734:Radian 2636:  2617:  2576:  2551:  2526:  2472:  2462:  2437:  2381:  2371:  2341:  1199:Since 879:) are 877:convex 873:Points 104:on an 3915:Main 3534:Lists 3393:Ratio 3331:Power 3067:Euler 2884:Chain 2874:Power 2749:Slope 2524:S2CID 2201:of a 1671:is a 921:then 867:slope 69:, or 4035:Lens 3989:Sets 3839:Maps 3746:and 3403:Term 3398:Root 3137:Curl 2634:ISBN 2615:ISBN 2574:ISBN 2549:ISBN 2488:link 2470:OCLC 2460:ISBN 2435:ISSN 2379:OCLC 2369:ISBN 2339:ISBN 2263:and 2079:sine 2077:The 2027:Any 1918:The 1845:and 1763:and 1704:. A 1696:Any 1359:For 1049:and 682:and 560:and 455:and 356:> 140:and 36:, a 4089:(Hw 2879:Sum 2607:doi 2516:doi 2425:doi 2259:In 2244:In 2225:In 2139:log 1945:log 1212:= 0 1164:on 1160:is 1053:in 942:If 917:is 905:is 886:If 753:is 309:if 112:in 32:In 4160:: 4081:(H 4079:, 4075:, 4071:, 4008:) 4004:, 3884:) 3862:K- 2613:. 2522:. 2510:. 2484:}} 2480:{{ 2468:. 2433:. 2421:98 2419:. 2415:. 2377:. 2353:^ 2267:, 2248:, 2233:, 1669:−f 1403:: 1031:A 950:: 842:A 723:. 481:. 198:, 73:. 65:, 61:, 57:, 4095:) 4093:) 4091:x 4085:) 4083:x 4067:( 4042:/ 4000:( 3855:( 3736:e 3729:t 3722:v 2670:e 2663:t 2656:v 2642:. 2623:. 2609:: 2582:. 2557:. 2530:. 2518:: 2512:9 2490:) 2476:. 2441:. 2427:: 2385:. 2347:. 2272:( 2206:B 2184:| 2180:B 2176:| 2154:| 2150:B 2146:| 2136:= 2133:) 2130:B 2127:( 2124:f 2113:. 2101:] 2095:, 2092:0 2089:[ 2062:b 2059:+ 2056:x 2053:a 2050:= 2047:) 2044:x 2041:( 2038:f 2010:x 2007:1 1985:) 1979:, 1976:0 1973:( 1952:x 1942:= 1939:) 1936:x 1933:( 1930:f 1898:2 1894:/ 1890:3 1886:x 1882:4 1878:1 1870:= 1867:) 1864:x 1861:( 1854:g 1833:2 1827:= 1824:) 1821:x 1818:( 1811:f 1788:x 1783:= 1780:) 1777:x 1774:( 1771:g 1749:2 1745:x 1738:= 1735:) 1732:x 1729:( 1726:f 1686:. 1661:f 1652:n 1632:) 1629:b 1626:+ 1623:a 1620:( 1617:f 1614:= 1611:) 1608:b 1605:+ 1602:a 1599:( 1596:f 1590:b 1587:+ 1584:a 1580:b 1575:+ 1572:) 1569:b 1566:+ 1563:a 1560:( 1557:f 1551:b 1548:+ 1545:a 1541:a 1532:) 1525:b 1522:+ 1519:a 1515:b 1510:) 1507:b 1504:+ 1501:a 1498:( 1494:( 1490:f 1487:+ 1483:) 1476:b 1473:+ 1470:a 1466:a 1461:) 1458:b 1455:+ 1452:a 1449:( 1445:( 1441:f 1438:= 1435:) 1432:b 1429:( 1426:f 1423:+ 1420:) 1417:a 1414:( 1411:f 1391:) 1385:, 1382:0 1379:[ 1373:b 1370:, 1367:a 1345:. 1342:) 1339:x 1336:( 1333:f 1330:t 1324:) 1321:0 1318:( 1315:f 1312:) 1309:t 1303:1 1300:( 1297:+ 1294:) 1291:x 1288:( 1285:f 1282:t 1276:) 1273:0 1267:) 1264:t 1258:1 1255:( 1252:+ 1249:x 1246:t 1243:( 1240:f 1237:= 1234:) 1231:x 1228:t 1225:( 1222:f 1210:y 1201:f 1184:) 1178:, 1175:0 1172:[ 1158:f 1152:f 1147:f 1129:2 1125:) 1122:y 1119:( 1116:f 1113:+ 1110:) 1107:x 1104:( 1101:f 1091:) 1086:2 1082:y 1079:+ 1076:x 1070:( 1066:f 1056:C 1051:y 1047:x 1038:C 1017:] 1014:x 1008:y 1005:[ 1002:) 999:x 996:( 989:f 985:+ 982:) 979:x 976:( 973:f 967:) 964:y 961:( 958:f 944:f 939:. 936:x 932:x 930:( 928:f 923:f 896:f 888:f 883:. 869:. 847:f 807:} 804:a 798:) 795:x 792:( 789:f 786:: 783:x 780:{ 777:= 774:) 771:a 768:( 765:S 741:f 711:) 708:) 705:y 702:( 699:f 696:, 693:y 690:( 670:) 667:) 664:x 661:( 658:f 655:, 652:x 649:( 629:f 609:) 606:) 603:z 600:( 597:f 594:, 591:z 588:( 568:y 548:x 528:z 507:R 499:R 495:: 492:f 469:y 463:x 443:) 440:1 437:, 434:0 431:( 401:) 398:y 395:( 392:f 386:+ 383:) 380:x 377:( 374:f 371:) 362:1 359:( 353:) 350:y 344:+ 341:x 338:) 329:1 326:( 323:( 320:f 290:) 287:y 284:( 281:f 275:+ 272:) 269:x 266:( 263:f 260:) 251:1 248:( 242:) 239:y 233:+ 230:x 227:) 218:1 215:( 212:( 209:f 186:] 183:1 180:, 177:0 174:[ 148:y 128:x 92:f 20:)

Index

Concave functions
mathematics
hypograph
convex functions
synonymously
function
interval
convex set
vector space

quasiconcave

differentiable function
interval
derivative
monotonically decreasing
slope
Points
convex
inflection points
differentiable
if and only if
non-positive
acceleration
negative
Taylor approximation
Lebesgue measurable function
if and only if
subadditive
if and only if

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