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Lebesgue–Stieltjes integration

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1542: 2710: 1312: 42:, preserving the many advantages of the former in a more general measure-theoretic framework. The Lebesgue–Stieltjes integral is the ordinary Lebesgue integral with respect to a measure known as the Lebesgue–Stieltjes measure, which may be associated to any function of 2280: 568: 1170: 1732: 805: 3062: 1614: 1869: 1537:{\displaystyle {\begin{aligned}{\overline {I}}(h)&=\sup \left\{I(f)\ :\ f\in C,0\leq f\leq h\right\}\\{\overline {\overline {I}}}(h)&=\inf \left\{I(f)\ :\ f\in C,h\leq f\right\}.\end{aligned}}} 2475: 2367: 1317: 277: 215: 2079: 1282: 2939: 2118: 653: 162: 891: 2408: 450: 1006: 1901: 1638: 1915:. This notion is quite useful for various applications: for example, in muddy terrain the speed in which a person can move may depend on how deep the mud is. If 3610: 689: 2975: 1553: 3505: 3410: 2705:{\displaystyle U(t)V(t)=U(0)V(0)+\int _{(0,t]}U(s-)\,dV(s)+\int _{(0,t]}V(s-)\,dU(s)+\sum _{u\in (0,t]}\Delta U_{u}\Delta V_{u},} 1802: 407: 3168: 3415: 3390: 3488: 3240: 300: 2296: 3483: 3405: 3212: 3099: 232: 170: 2007: 3420: 3385: 2962: 1212: 3400: 2285:
Here the relevant Lebesgue–Stieltjes measures are associated with the right-continuous versions of the functions
2275:{\displaystyle \int _{a}^{b}U\,dV+\int _{a}^{b}V\,dU=U(b+)V(b+)-U(a-)V(a-),\qquad -\infty <a<b<\infty .} 3335: 3295: 3136: 3068: 2875: 35: 2884: 598: 107: 3395: 1757:
Integrators of bounded variation are handled as above by decomposing into positive and negative variations.
823: 3574: 3559: 3358: 563:{\displaystyle \mu _{g}(E)=\inf \left\{\sum _{i}\mu _{g}(I_{i})\ :\ E\subseteq \bigcup _{i}I_{i}\right\}} 3528: 3495: 3363: 2372: 3373: 1296: 1165:{\displaystyle \int _{a}^{b}f(x)\,dg(x)=\int _{a}^{b}f(x)\,dg_{1}(x)-\int _{a}^{b}f(x)\,dg_{2}(x),} 62: 2450:
are of finite variation on this unbounded interval. Complex-valued functions may be used as well.
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on . This functional can then be extended to the class of all non-negative functions by setting
1877: 1727:{\displaystyle \mu _{g}(A):={\overline {I}}(\chi _{A})={\overline {\overline {I}}}(\chi _{A})} 3533: 3435: 2779: 86: 47: 23: 3380: 3270: 2109: 441: 39: 8: 3515: 3430: 3425: 3315: 2867: 2454: 222: 58: 3194: 2874:
is a non-decreasing real function, the Lebesgue–Stieltjes integral is equivalent to the
3538: 3475: 3368: 3340: 3305: 3226: 3116: 2954: 1747: 82: 78: 3587: 3564: 3500: 3470: 3462: 3440: 3310: 3208: 3164: 2839: 1777: 659: 296: 280: 43: 3189: 2743: 2465:
of finite variation, which are both right-continuous and have left-limits (they are
3582: 3445: 3330: 3290: 3285: 3280: 3275: 3265: 3108: 2823: 2746:, and is of use in the general theory of stochastic integration. The final term is 1188: 226: 90: 3153: 3569: 3452: 3325: 3160: 1944: 927: 3523: 1619:
and either side of the identity then defines the Lebesgue–Stieltjes integral of
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where the latter two integrals are well-defined by the preceding construction.
50:, and conversely every regular Borel measure on the real line is of this kind. 20: 3604: 3554: 1952: 1303: 437: 218: 3300: 3177: 581:
by countably many semiopen intervals. This measure is sometimes called the
74: 3097:
Hewitt, Edwin (May 1960). "Integration by Parts for Stieltjes Integrals".
2466: 27: 3120: 2853: 800:{\displaystyle \int _{a}^{b}f(x)\,dg(x):=-\int _{a}^{b}f(x)\,d(-g)(x),} 77:, to whom much of the theory is due. They find common application in 2778:. (The earlier result can then be seen as a result pertaining to the 3112: 3249: 3057:{\displaystyle \int _{-\infty }^{\infty }f(x)\,dv(x)=\mathrm {E} .} 54: 2453:
An alternative result, of significant importance in the theory of
1609:{\displaystyle {\overline {I}}(h)={\overline {\overline {I}}}(h),} 996:
is bounded, the Lebesgue–Stieltjes integral of f with respect to
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the latter integral being defined by the preceding construction.
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be a non-decreasing right-continuous function on , and define
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of finite variation, if at each point either at least one of
3218: 1864:{\displaystyle \int _{a}^{b}\rho (\gamma (t))\,d\ell (t),} 2944:
for the Lebesgue–Stieltjes integral, letting the measure
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with respect to the Euclidean metric weighted by ρ to be
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that extends the usual Riemann–Stieltjes integral. Let
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is monotone non-decreasing and right-continuous. Define
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on the real line. The Lebesgue–Stieltjes measure is a
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is Borel measurable. Then we may define the length of
1187:) is to define the Lebesgue–Stieltjes integral as the 817:
is of bounded variation, then it is possible to write
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Integral, Measure, and Derivative: A Unified Approach
2978: 2887: 2478: 2375: 2121: 2010: 1880: 1805: 1641: 1556: 1315: 1215: 1009: 826: 692: 601: 453: 235: 173: 110: 2854:
Riemann–Stieltjes integration and probability theory
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denotes the inverse of the walking speed at or near
3207:, Richard A. Silverman, trans. Dover Publications. 2362:{\textstyle {\tilde {U}}(x)=\lim _{t\to x^{+}}U(t)} 2112:formula for the Lebesgue–Stieltjes integral holds: 3152: 3056: 2933: 2704: 2402: 2361: 2274: 2073: 1895: 1863: 1726: 1608: 1536: 1276: 1164: 885: 799: 647: 562: 271: 209: 156: 3602: 2953:remain implicit. This is particularly common in 2325: 1951:-length of curves and is useful in the study of 1457: 1346: 476: 3176: 2770:which arises from the quadratic covariation of 1184: 272:{\displaystyle g:\left\rightarrow \mathbb {R} } 210:{\displaystyle f:\left\rightarrow \mathbb {R} } 2074:{\displaystyle f(a)={\frac {f(a-)+f(a+)}{2}}.} 3234: 3071:for more detail on dealing with such cases.) 1277:{\displaystyle I(f)=\int _{a}^{b}f(x)\,dg(x)} 2870:real-valued function of a real variable and 2742:. This result can be seen as a precursor to 2422:may be replaced with an unbounded interval 357:(Alternatively, the construction works for 3241: 3227: 3009: 2915: 2826:, and the Lebesgue–Stieltjes integral of 2626: 2570: 2168: 2140: 1842: 1258: 1136: 1083: 1037: 769: 720: 629: 265: 203: 138: 3506:Common integrals in quantum field theory 2934:{\displaystyle \int _{a}^{b}f(x)\,dv(x)} 1547:For Borel measurable functions, one has 648:{\displaystyle \int _{a}^{b}f(x)\,dg(x)} 157:{\displaystyle \int _{a}^{b}f(x)\,dg(x)} 3611:Definitions of mathematical integration 3416:Differentiation under the integral sign 2790: 1958: 3603: 3147: 3096: 2457:is the following. Given two functions 1939:is the time it would take to traverse 886:{\displaystyle g(x)=g_{1}(x)-g_{2}(x)} 3222: 1206:to be the Riemann–Stieltjes integral 1903:is the length of the restriction of 3137:Henstock-Kurzweil-Stiltjes Integral 2785: 1971:is said to be "regular" at a point 1178: 13: 3029: 2992: 2987: 2686: 2673: 2266: 2248: 1975:if the right and left hand limits 1907:to . This is sometimes called the 410:, there is a unique Borel measure 283:in and right-continuous, or when 14: 3622: 3100:The American Mathematical Monthly 2965:of a real-valued random variable 1997:exist, and the function takes at 2963:cumulative distribution function 2403:{\displaystyle {\tilde {V}}(x).} 592:The Lebesgue–Stieltjes integral 408:Carathéodory's extension theorem 101:The Lebesgue–Stieltjes integral 2878:, in which case we often write 2244: 683:is non-increasing, then define 3090: 3081: 3048: 3045: 3039: 3033: 3022: 3016: 3006: 3000: 2928: 2922: 2912: 2906: 2668: 2656: 2639: 2633: 2623: 2614: 2606: 2594: 2583: 2577: 2567: 2558: 2550: 2538: 2527: 2521: 2515: 2509: 2500: 2494: 2488: 2482: 2394: 2388: 2382: 2356: 2350: 2332: 2318: 2312: 2306: 2238: 2229: 2223: 2214: 2205: 2196: 2190: 2181: 2059: 2050: 2041: 2032: 2020: 2014: 1890: 1884: 1855: 1849: 1839: 1836: 1830: 1824: 1721: 1708: 1687: 1674: 1658: 1652: 1600: 1594: 1573: 1567: 1507: 1495: 1474: 1468: 1447: 1441: 1396: 1384: 1363: 1357: 1336: 1330: 1271: 1265: 1255: 1249: 1225: 1219: 1156: 1150: 1133: 1127: 1103: 1097: 1080: 1074: 1050: 1044: 1034: 1028: 880: 874: 858: 852: 836: 830: 791: 785: 782: 773: 766: 760: 733: 727: 717: 711: 642: 636: 626: 620: 517: 504: 470: 464: 261: 199: 151: 145: 135: 129: 32:Lebesgue–Stieltjes integration 16:Lebesgue-Stieltjes integration 1: 3248: 3203:, and Gurevich, B. L., 1978. 3141: 3069:Riemann–Stieltjes integration 1287:for all continuous functions 985:are monotone non-decreasing. 96: 85:, and in certain branches of 1703: 1699: 1669: 1589: 1585: 1562: 1436: 1432: 1325: 670:with respect to the measure 577:taken over all coverings of 7: 3321:Lebesgue–Stieltjes integral 3131: 1185:Hewitt & Stromberg 1965 10: 3627: 3336:Riemann–Stieltjes integral 3296:Henstock–Kurzweil integral 3182:Real and abstract analysis 3180:; Stromberg, Karl (1965), 2876:Riemann–Stieltjes integral 2108:are both regular, then an 1760: 583:Lebesgue–Stieltjes measure 3575:Proof that 22/7 exceeds π 3547: 3514: 3461: 3349: 3256: 1183:An alternative approach ( 3074: 1947:uses this notion of the 1896:{\displaystyle \ell (t)} 303:. To start, assume that 67:Lebesgue–Radon integrals 63:Thomas Joannes Stieltjes 26:and related branches of 3560:Euler–Maclaurin formula 3195:Theory of the Integral. 167:is defined when   3529:Russo–Vallois integral 3496:Bose–Einstein integral 3411:Parametric derivatives 3087:Halmos (1974), Sec. 15 3058: 2935: 2706: 2404: 2363: 2276: 2075: 1897: 1865: 1728: 1610: 1538: 1278: 1166: 934:in the interval , and 887: 801: 649: 564: 419:on which agrees with 273: 211: 158: 3534:Stratonovich integral 3480:Fermi–Dirac integral 3436:Numerical integration 3059: 2936: 2838:is equivalent to the 2780:Stratonovich integral 2707: 2410:The bounded interval 2405: 2364: 2277: 2076: 1898: 1866: 1729: 1623:. The outer measure 1611: 1539: 1279: 1167: 888: 802: 679:in the usual way. If 650: 565: 274: 212: 159: 48:regular Borel measure 3516:Stochastic integrals 3159:, Berlin, New York: 3067:(See the article on 2976: 2885: 2791:Lebesgue integration 2476: 2373: 2297: 2119: 2110:integration by parts 2084:Given two functions 2008: 1959:Integration by parts 1878: 1803: 1639: 1554: 1313: 1213: 1007: 824: 690: 599: 451: 442:metric outer measure 311:is non-negative and 291:is non-negative and 233: 171: 108: 83:stochastic processes 65:, are also known as 40:Lebesgue integration 3426:Contour integration 3316:Kolmogorov integral 2996: 2902: 2455:stochastic calculus 2164: 2136: 1820: 1245: 1123: 1070: 1024: 756: 707: 616: 125: 59:Henri Leon Lebesgue 53:Lebesgue–Stieltjes 3539:Skorokhod integral 3476:Dirichlet integral 3463:Improper integrals 3406:Reduction formulas 3341:Regulated integral 3306:Hellinger integral 3054: 2979: 2955:probability theory 2931: 2888: 2702: 2672: 2400: 2359: 2346: 2272: 2150: 2122: 2071: 2001:the average value 1953:conformal mappings 1893: 1861: 1806: 1748:indicator function 1724: 1606: 1534: 1532: 1274: 1231: 1162: 1109: 1056: 1010: 883: 797: 742: 693: 658:is defined as the 645: 602: 560: 544: 493: 423:on every interval 269: 207: 154: 111: 3598: 3597: 3501:Frullani integral 3471:Gaussian integral 3421:Laplace transform 3396:Inverse functions 3386:Partial fractions 3311:Khinchin integral 3271:Lebesgue integral 3184:, Springer-Verlag 3170:978-0-387-90088-9 2969:, in which case 2840:Lebesgue integral 2645: 2385: 2324: 2309: 2100:is continuous or 2066: 1943:. The concept of 1780:in the plane and 1778:rectifiable curve 1706: 1702: 1672: 1592: 1588: 1565: 1485: 1479: 1439: 1435: 1374: 1368: 1328: 660:Lebesgue integral 535: 528: 522: 484: 361:left-continuous, 281:bounded variation 44:bounded variation 36:Riemann–Stieltjes 34:generalizes both 21:measure-theoretic 3618: 3446:Trapezoidal rule 3431:Laplace's method 3331:Pfeffer integral 3291:Darboux integral 3286:Daniell integral 3281:Bochner integral 3276:Burkill integral 3266:Riemann integral 3243: 3236: 3229: 3220: 3219: 3185: 3173: 3158: 3125: 3124: 3094: 3088: 3085: 3063: 3061: 3060: 3055: 3032: 2995: 2990: 2968: 2960: 2952: 2940: 2938: 2937: 2932: 2901: 2896: 2873: 2865: 2849: 2837: 2834:with respect to 2833: 2824:Lebesgue measure 2821: 2812: 2808: 2786:Related concepts 2777: 2773: 2769: 2741: 2711: 2709: 2708: 2703: 2698: 2697: 2685: 2684: 2671: 2610: 2609: 2554: 2553: 2469:functions) then 2464: 2460: 2449: 2445: 2441: 2437: 2429: 2421: 2409: 2407: 2406: 2401: 2387: 2386: 2378: 2368: 2366: 2365: 2360: 2345: 2344: 2343: 2311: 2310: 2302: 2292: 2288: 2281: 2279: 2278: 2273: 2163: 2158: 2135: 2130: 2107: 2103: 2099: 2095: 2091: 2087: 2080: 2078: 2077: 2072: 2067: 2062: 2027: 2000: 1996: 1985: 1974: 1970: 1950: 1942: 1938: 1934: 1930: 1926: 1914: 1910: 1906: 1902: 1900: 1899: 1894: 1870: 1868: 1867: 1862: 1819: 1814: 1795: 1791: 1775: 1753: 1745: 1733: 1731: 1730: 1725: 1720: 1719: 1707: 1695: 1694: 1686: 1685: 1673: 1665: 1651: 1650: 1631: 1622: 1615: 1613: 1612: 1607: 1593: 1581: 1580: 1566: 1558: 1543: 1541: 1540: 1535: 1533: 1526: 1522: 1483: 1477: 1440: 1428: 1427: 1421: 1417: 1372: 1366: 1329: 1321: 1301: 1294: 1283: 1281: 1280: 1275: 1244: 1239: 1205: 1194: 1189:Daniell integral 1179:Daniell integral 1171: 1169: 1168: 1163: 1149: 1148: 1122: 1117: 1096: 1095: 1069: 1064: 1023: 1018: 999: 995: 984: 975: 966: 933: 925: 921: 920: 892: 890: 889: 884: 873: 872: 851: 850: 816: 806: 804: 803: 798: 755: 750: 706: 701: 682: 678: 669: 654: 652: 651: 646: 615: 610: 588: 585:associated with 580: 569: 567: 566: 561: 559: 555: 554: 553: 543: 526: 520: 516: 515: 503: 502: 492: 463: 462: 435: 426: 422: 418: 402: 391: 360: 356: 345: 314: 310: 301:right-continuous 294: 290: 278: 276: 275: 270: 268: 260: 256: 216: 214: 213: 208: 206: 198: 194: 163: 161: 160: 155: 124: 119: 91:potential theory 3626: 3625: 3621: 3620: 3619: 3617: 3616: 3615: 3601: 3600: 3599: 3594: 3570:Integration Bee 3543: 3510: 3457: 3453:Risch algorithm 3391:Euler's formula 3351: 3345: 3326:Pettis integral 3258: 3252: 3247: 3190:Saks, Stanisław 3171: 3161:Springer-Verlag 3149:Halmos, Paul R. 3144: 3134: 3129: 3128: 3113:10.2307/2309287 3095: 3091: 3086: 3082: 3077: 3028: 2991: 2983: 2977: 2974: 2973: 2966: 2958: 2950: 2945: 2897: 2892: 2886: 2883: 2882: 2871: 2859: 2856: 2843: 2835: 2827: 2819: 2814: 2810: 2796: 2793: 2788: 2775: 2771: 2747: 2722: 2716: 2693: 2689: 2680: 2676: 2649: 2593: 2589: 2537: 2533: 2477: 2474: 2473: 2462: 2458: 2447: 2443: 2439: 2431: 2423: 2411: 2377: 2376: 2374: 2371: 2370: 2339: 2335: 2328: 2301: 2300: 2298: 2295: 2294: 2290: 2286: 2159: 2154: 2131: 2126: 2120: 2117: 2116: 2105: 2101: 2097: 2093: 2089: 2085: 2028: 2026: 2009: 2006: 2005: 1998: 1987: 1976: 1972: 1964: 1961: 1948: 1945:extremal length 1940: 1936: 1932: 1928: 1916: 1912: 1908: 1904: 1879: 1876: 1875: 1815: 1810: 1804: 1801: 1800: 1793: 1781: 1766: 1763: 1751: 1743: 1738: 1715: 1711: 1693: 1681: 1677: 1664: 1646: 1642: 1640: 1637: 1636: 1632:is defined via 1629: 1624: 1620: 1579: 1557: 1555: 1552: 1551: 1531: 1530: 1464: 1460: 1450: 1426: 1423: 1422: 1353: 1349: 1339: 1320: 1316: 1314: 1311: 1310: 1299: 1288: 1240: 1235: 1214: 1211: 1210: 1196: 1192: 1181: 1144: 1140: 1118: 1113: 1091: 1087: 1065: 1060: 1019: 1014: 1008: 1005: 1004: 997: 989: 983: 977: 974: 968: 952: 941: 935: 931: 928:total variation 919: 914: 913: 912: 903: 897: 868: 864: 846: 842: 825: 822: 821: 814: 751: 746: 702: 697: 691: 688: 687: 680: 676: 671: 663: 611: 606: 600: 597: 596: 586: 578: 549: 545: 539: 511: 507: 498: 494: 488: 483: 479: 458: 454: 452: 449: 448: 436:arises from an 433: 428: 427:. The measure 424: 420: 416: 411: 393: 362: 358: 347: 316: 312: 304: 292: 284: 264: 246: 242: 234: 231: 230: 202: 184: 180: 172: 169: 168: 120: 115: 109: 106: 105: 99: 71:Radon integrals 17: 12: 11: 5: 3624: 3614: 3613: 3596: 3595: 3593: 3592: 3591: 3590: 3585: 3577: 3572: 3567: 3565:Gabriel's horn 3562: 3557: 3551: 3549: 3545: 3544: 3542: 3541: 3536: 3531: 3526: 3520: 3518: 3512: 3511: 3509: 3508: 3503: 3498: 3493: 3492: 3491: 3486: 3478: 3473: 3467: 3465: 3459: 3458: 3456: 3455: 3450: 3449: 3448: 3443: 3441:Simpson's rule 3433: 3428: 3423: 3418: 3413: 3408: 3403: 3401:Changing order 3398: 3393: 3388: 3383: 3378: 3377: 3376: 3371: 3366: 3355: 3353: 3347: 3346: 3344: 3343: 3338: 3333: 3328: 3323: 3318: 3313: 3308: 3303: 3298: 3293: 3288: 3283: 3278: 3273: 3268: 3262: 3260: 3254: 3253: 3246: 3245: 3238: 3231: 3223: 3217: 3216: 3198: 3187: 3174: 3169: 3155:Measure Theory 3143: 3140: 3133: 3130: 3127: 3126: 3107:(5): 419–423. 3089: 3079: 3078: 3076: 3073: 3065: 3064: 3053: 3050: 3047: 3044: 3041: 3038: 3035: 3031: 3027: 3024: 3021: 3018: 3015: 3012: 3008: 3005: 3002: 2999: 2994: 2989: 2986: 2982: 2948: 2942: 2941: 2930: 2927: 2924: 2921: 2918: 2914: 2911: 2908: 2905: 2900: 2895: 2891: 2855: 2852: 2817: 2792: 2789: 2787: 2784: 2720: 2713: 2712: 2701: 2696: 2692: 2688: 2683: 2679: 2675: 2670: 2667: 2664: 2661: 2658: 2655: 2652: 2648: 2644: 2641: 2638: 2635: 2632: 2629: 2625: 2622: 2619: 2616: 2613: 2608: 2605: 2602: 2599: 2596: 2592: 2588: 2585: 2582: 2579: 2576: 2573: 2569: 2566: 2563: 2560: 2557: 2552: 2549: 2546: 2543: 2540: 2536: 2532: 2529: 2526: 2523: 2520: 2517: 2514: 2511: 2508: 2505: 2502: 2499: 2496: 2493: 2490: 2487: 2484: 2481: 2442:provided that 2399: 2396: 2393: 2390: 2384: 2381: 2369:and similarly 2358: 2355: 2352: 2349: 2342: 2338: 2334: 2331: 2327: 2323: 2320: 2317: 2314: 2308: 2305: 2293:; that is, to 2283: 2282: 2271: 2268: 2265: 2262: 2259: 2256: 2253: 2250: 2247: 2243: 2240: 2237: 2234: 2231: 2228: 2225: 2222: 2219: 2216: 2213: 2210: 2207: 2204: 2201: 2198: 2195: 2192: 2189: 2186: 2183: 2180: 2177: 2174: 2171: 2167: 2162: 2157: 2153: 2149: 2146: 2143: 2139: 2134: 2129: 2125: 2082: 2081: 2070: 2065: 2061: 2058: 2055: 2052: 2049: 2046: 2043: 2040: 2037: 2034: 2031: 2025: 2022: 2019: 2016: 2013: 1960: 1957: 1892: 1889: 1886: 1883: 1872: 1871: 1860: 1857: 1854: 1851: 1848: 1845: 1841: 1838: 1835: 1832: 1829: 1826: 1823: 1818: 1813: 1809: 1762: 1759: 1741: 1735: 1734: 1723: 1718: 1714: 1710: 1705: 1701: 1698: 1692: 1689: 1684: 1680: 1676: 1671: 1668: 1663: 1660: 1657: 1654: 1649: 1645: 1627: 1617: 1616: 1605: 1602: 1599: 1596: 1591: 1587: 1584: 1578: 1575: 1572: 1569: 1564: 1561: 1545: 1544: 1529: 1525: 1521: 1518: 1515: 1512: 1509: 1506: 1503: 1500: 1497: 1494: 1491: 1488: 1482: 1476: 1473: 1470: 1467: 1463: 1459: 1456: 1453: 1451: 1449: 1446: 1443: 1438: 1434: 1431: 1425: 1424: 1420: 1416: 1413: 1410: 1407: 1404: 1401: 1398: 1395: 1392: 1389: 1386: 1383: 1380: 1377: 1371: 1365: 1362: 1359: 1356: 1352: 1348: 1345: 1342: 1340: 1338: 1335: 1332: 1327: 1324: 1319: 1318: 1285: 1284: 1273: 1270: 1267: 1264: 1261: 1257: 1254: 1251: 1248: 1243: 1238: 1234: 1230: 1227: 1224: 1221: 1218: 1180: 1177: 1173: 1172: 1161: 1158: 1155: 1152: 1147: 1143: 1139: 1135: 1132: 1129: 1126: 1121: 1116: 1112: 1108: 1105: 1102: 1099: 1094: 1090: 1086: 1082: 1079: 1076: 1073: 1068: 1063: 1059: 1055: 1052: 1049: 1046: 1043: 1040: 1036: 1033: 1030: 1027: 1022: 1017: 1013: 1000:is defined by 981: 972: 950: 939: 915: 901: 894: 893: 882: 879: 876: 871: 867: 863: 860: 857: 854: 849: 845: 841: 838: 835: 832: 829: 808: 807: 796: 793: 790: 787: 784: 781: 778: 775: 772: 768: 765: 762: 759: 754: 749: 745: 741: 738: 735: 732: 729: 726: 723: 719: 716: 713: 710: 705: 700: 696: 674: 656: 655: 644: 641: 638: 635: 632: 628: 625: 622: 619: 614: 609: 605: 571: 570: 558: 552: 548: 542: 538: 534: 531: 525: 519: 514: 510: 506: 501: 497: 491: 487: 482: 478: 475: 472: 469: 466: 461: 457: 431: 414: 267: 263: 259: 255: 252: 249: 245: 241: 238: 205: 201: 197: 193: 190: 187: 183: 179: 176: 165: 164: 153: 150: 147: 144: 141: 137: 134: 131: 128: 123: 118: 114: 98: 95: 15: 9: 6: 4: 3: 2: 3623: 3612: 3609: 3608: 3606: 3589: 3586: 3584: 3581: 3580: 3578: 3576: 3573: 3571: 3568: 3566: 3563: 3561: 3558: 3556: 3555:Basel problem 3553: 3552: 3550: 3548:Miscellaneous 3546: 3540: 3537: 3535: 3532: 3530: 3527: 3525: 3522: 3521: 3519: 3517: 3513: 3507: 3504: 3502: 3499: 3497: 3494: 3490: 3487: 3485: 3482: 3481: 3479: 3477: 3474: 3472: 3469: 3468: 3466: 3464: 3460: 3454: 3451: 3447: 3444: 3442: 3439: 3438: 3437: 3434: 3432: 3429: 3427: 3424: 3422: 3419: 3417: 3414: 3412: 3409: 3407: 3404: 3402: 3399: 3397: 3394: 3392: 3389: 3387: 3384: 3382: 3379: 3375: 3372: 3370: 3367: 3365: 3364:Trigonometric 3362: 3361: 3360: 3357: 3356: 3354: 3348: 3342: 3339: 3337: 3334: 3332: 3329: 3327: 3324: 3322: 3319: 3317: 3314: 3312: 3309: 3307: 3304: 3302: 3301:Haar integral 3299: 3297: 3294: 3292: 3289: 3287: 3284: 3282: 3279: 3277: 3274: 3272: 3269: 3267: 3264: 3263: 3261: 3255: 3251: 3244: 3239: 3237: 3232: 3230: 3225: 3224: 3221: 3214: 3213:0-486-63519-8 3210: 3206: 3202: 3201:Shilov, G. E. 3199: 3197: 3196: 3191: 3188: 3183: 3179: 3178:Hewitt, Edwin 3175: 3172: 3166: 3162: 3157: 3156: 3150: 3146: 3145: 3139: 3138: 3122: 3118: 3114: 3110: 3106: 3102: 3101: 3093: 3084: 3080: 3072: 3070: 3051: 3042: 3036: 3025: 3019: 3013: 3010: 3003: 2997: 2984: 2980: 2972: 2971: 2970: 2964: 2956: 2951: 2925: 2919: 2916: 2909: 2903: 2898: 2893: 2889: 2881: 2880: 2879: 2877: 2869: 2863: 2851: 2847: 2841: 2831: 2825: 2820: 2809:for all real 2807: 2803: 2799: 2783: 2781: 2767: 2763: 2759: 2755: 2751: 2745: 2739: 2735: 2731: 2727: 2723: 2699: 2694: 2690: 2681: 2677: 2665: 2662: 2659: 2653: 2650: 2646: 2642: 2636: 2630: 2627: 2620: 2617: 2611: 2603: 2600: 2597: 2590: 2586: 2580: 2574: 2571: 2564: 2561: 2555: 2547: 2544: 2541: 2534: 2530: 2524: 2518: 2512: 2506: 2503: 2497: 2491: 2485: 2479: 2472: 2471: 2470: 2468: 2456: 2451: 2435: 2427: 2419: 2415: 2397: 2391: 2379: 2353: 2347: 2340: 2336: 2329: 2321: 2315: 2303: 2269: 2263: 2260: 2257: 2254: 2251: 2245: 2241: 2235: 2232: 2226: 2220: 2217: 2211: 2208: 2202: 2199: 2193: 2187: 2184: 2178: 2175: 2172: 2169: 2165: 2160: 2155: 2151: 2147: 2144: 2141: 2137: 2132: 2127: 2123: 2115: 2114: 2113: 2111: 2068: 2063: 2056: 2053: 2047: 2044: 2038: 2035: 2029: 2023: 2017: 2011: 2004: 2003: 2002: 1994: 1990: 1983: 1979: 1968: 1956: 1954: 1946: 1924: 1920: 1887: 1881: 1858: 1852: 1846: 1843: 1833: 1827: 1821: 1816: 1811: 1807: 1799: 1798: 1797: 1789: 1785: 1779: 1774: 1770: 1765:Suppose that 1758: 1755: 1749: 1744: 1716: 1712: 1696: 1690: 1682: 1678: 1666: 1661: 1655: 1647: 1643: 1635: 1634: 1633: 1630: 1603: 1597: 1582: 1576: 1570: 1559: 1550: 1549: 1548: 1527: 1523: 1519: 1516: 1513: 1510: 1504: 1501: 1498: 1492: 1489: 1486: 1480: 1471: 1465: 1461: 1454: 1452: 1444: 1429: 1418: 1414: 1411: 1408: 1405: 1402: 1399: 1393: 1390: 1387: 1381: 1378: 1375: 1369: 1360: 1354: 1350: 1343: 1341: 1333: 1322: 1309: 1308: 1307: 1305: 1304:Radon measure 1298: 1292: 1268: 1262: 1259: 1252: 1246: 1241: 1236: 1232: 1228: 1222: 1216: 1209: 1208: 1207: 1203: 1199: 1190: 1186: 1176: 1159: 1153: 1145: 1141: 1137: 1130: 1124: 1119: 1114: 1110: 1106: 1100: 1092: 1088: 1084: 1077: 1071: 1066: 1061: 1057: 1053: 1047: 1041: 1038: 1031: 1025: 1020: 1015: 1011: 1003: 1002: 1001: 993: 986: 980: 971: 964: 960: 956: 949: 945: 938: 929: 924: 918: 911: 907: 900: 877: 869: 865: 861: 855: 847: 843: 839: 833: 827: 820: 819: 818: 811: 794: 788: 779: 776: 770: 763: 757: 752: 747: 743: 739: 736: 730: 724: 721: 714: 708: 703: 698: 694: 686: 685: 684: 677: 667: 661: 639: 633: 630: 623: 617: 612: 607: 603: 595: 594: 593: 590: 584: 576: 556: 550: 546: 540: 536: 532: 529: 523: 512: 508: 499: 495: 489: 485: 480: 473: 467: 459: 455: 447: 446: 445: 443: 439: 438:outer measure 434: 417: 409: 404: 400: 396: 389: 385: 381: 377: 373: 369: 365: 354: 350: 343: 339: 335: 331: 327: 323: 319: 308: 302: 298: 288: 282: 279:  is of 257: 253: 250: 247: 243: 239: 236: 228: 224: 220: 195: 191: 188: 185: 181: 177: 174: 148: 142: 139: 132: 126: 121: 116: 112: 104: 103: 102: 94: 92: 88: 84: 80: 76: 72: 68: 64: 60: 56: 51: 49: 45: 41: 37: 33: 29: 25: 22: 3524:Itô integral 3359:Substitution 3350:Integration 3320: 3204: 3193: 3181: 3154: 3135: 3104: 3098: 3092: 3083: 3066: 2946: 2943: 2861: 2857: 2845: 2829: 2815: 2805: 2801: 2797: 2794: 2765: 2761: 2757: 2753: 2749: 2737: 2733: 2729: 2725: 2718: 2714: 2452: 2433: 2425: 2417: 2413: 2284: 2083: 1992: 1988: 1981: 1977: 1966: 1962: 1922: 1918: 1873: 1787: 1783: 1772: 1768: 1764: 1756: 1739: 1736: 1625: 1618: 1546: 1290: 1286: 1201: 1197: 1182: 1174: 991: 987: 978: 969: 962: 958: 954: 947: 943: 936: 922: 916: 909: 905: 898: 895: 812: 809: 672: 665: 657: 591: 582: 572: 440:(in fact, a 429: 412: 405: 398: 394: 387: 383: 379: 375: 371: 367: 363: 352: 348: 341: 337: 333: 329: 325: 321: 317: 306: 286: 166: 100: 75:Johann Radon 70: 66: 57:, named for 52: 31: 18: 3374:Weierstrass 2744:Itô's lemma 1963:A function 1935:-length of 1931:, then the 1911:-length of 1771: : → 444:) given by 229:and   79:probability 28:mathematics 3489:incomplete 3352:techniques 3142:References 2868:continuous 1302:defines a 1297:functional 223:measurable 217:  is 97:Definition 89:including 3259:integrals 3257:Types of 3250:Integrals 2993:∞ 2988:∞ 2985:− 2981:∫ 2890:∫ 2687:Δ 2674:Δ 2654:∈ 2647:∑ 2621:− 2591:∫ 2565:− 2535:∫ 2383:~ 2333:→ 2307:~ 2267:∞ 2249:∞ 2246:− 2236:− 2221:− 2209:− 2152:∫ 2124:∫ 2039:− 1882:ℓ 1847:ℓ 1828:γ 1822:ρ 1808:∫ 1713:χ 1704:¯ 1700:¯ 1679:χ 1670:¯ 1644:μ 1590:¯ 1586:¯ 1563:¯ 1517:≤ 1490:∈ 1437:¯ 1433:¯ 1412:≤ 1406:≤ 1379:∈ 1326:¯ 1233:∫ 1111:∫ 1107:− 1058:∫ 1012:∫ 862:− 777:− 744:∫ 740:− 695:∫ 604:∫ 537:⋃ 533:⊆ 496:μ 486:∑ 456:μ 262:→ 200:→ 113:∫ 55:integrals 3605:Category 3579:Volumes 3484:complete 3381:By parts 3151:(1974), 3132:Also see 1991: ( 1980: ( 1790:→ [0, ∞) 1786: : 1204: ) 1200:(  988:Now, if 297:monotone 87:analysis 73:, after 69:or just 24:analysis 3583:Washers 3192:(1937) 3121:2309287 2961:is the 2864:  2860:  2848:  2844:  2832:  2828:  2822:is the 2813:, then 2440:(-∞, ∞) 1969:  1965:  1917:  1782:  1767:  1761:Example 1746:is the 1293:  1289:  994:  990:  967:. Both 926:is the 668:  664:  575:infimum 309:  305:  289:  285:  227:bounded 3588:Shells 3211:  3167:  3119:  2858:Where 2715:where 2467:càdlàg 1874:where 1737:where 1484:  1478:  1373:  1367:  1295:. The 896:where 527:  521:  401:}) = 0 355:}) = 0 3369:Euler 3117:JSTOR 3075:Notes 2957:when 2866:is a 2795:When 2424:(-∞, 1776:is a 374:)) = 328:]) = 219:Borel 3209:ISBN 3165:ISBN 2804:) = 2774:and 2764:) = 2732:) − 2461:and 2446:and 2436:, ∞) 2289:and 2264:< 2258:< 2252:< 2104:and 2088:and 1986:and 976:and 957:) − 946:) = 908:) = 573:the 392:and 382:) − 346:and 336:) − 299:and 225:and 81:and 61:and 38:and 3109:doi 2842:of 2782:.) 2438:or 2326:lim 2096:or 1750:of 1458:inf 1347:sup 930:of 813:If 662:of 477:inf 406:By 403:). 295:is 19:In 3607:: 3163:, 3115:. 3105:67 3103:. 2850:. 2756:)Δ 2740:−) 2724:= 2430:, 2416:, 1995:−) 1984:+) 1955:. 1754:. 1662::= 737::= 589:. 397:({ 366:([ 351:({ 324:, 320:(( 93:. 30:, 3242:e 3235:t 3228:v 3215:. 3186:. 3123:. 3111:: 3052:. 3049:] 3046:) 3043:X 3040:( 3037:f 3034:[ 3030:E 3026:= 3023:) 3020:x 3017:( 3014:v 3011:d 3007:) 3004:x 3001:( 2998:f 2967:X 2959:v 2949:v 2947:μ 2929:) 2926:x 2923:( 2920:v 2917:d 2913:) 2910:x 2907:( 2904:f 2899:b 2894:a 2872:v 2862:f 2846:f 2836:g 2830:f 2818:g 2816:μ 2811:x 2806:x 2802:x 2800:( 2798:g 2776:V 2772:U 2768:, 2766:d 2762:t 2760:( 2758:V 2754:t 2752:( 2750:U 2748:Δ 2738:t 2736:( 2734:U 2730:t 2728:( 2726:U 2721:t 2719:U 2717:Δ 2700:, 2695:u 2691:V 2682:u 2678:U 2669:] 2666:t 2663:, 2660:0 2657:( 2651:u 2643:+ 2640:) 2637:s 2634:( 2631:U 2628:d 2624:) 2618:s 2615:( 2612:V 2607:] 2604:t 2601:, 2598:0 2595:( 2587:+ 2584:) 2581:s 2578:( 2575:V 2572:d 2568:) 2562:s 2559:( 2556:U 2551:] 2548:t 2545:, 2542:0 2539:( 2531:+ 2528:) 2525:0 2522:( 2519:V 2516:) 2513:0 2510:( 2507:U 2504:= 2501:) 2498:t 2495:( 2492:V 2489:) 2486:t 2483:( 2480:U 2463:V 2459:U 2448:V 2444:U 2434:a 2432:( 2428:) 2426:b 2420:) 2418:b 2414:a 2412:( 2398:. 2395:) 2392:x 2389:( 2380:V 2357:) 2354:t 2351:( 2348:U 2341:+ 2337:x 2330:t 2322:= 2319:) 2316:x 2313:( 2304:U 2291:V 2287:U 2270:. 2261:b 2255:a 2242:, 2239:) 2233:a 2230:( 2227:V 2224:) 2218:a 2215:( 2212:U 2206:) 2203:+ 2200:b 2197:( 2194:V 2191:) 2188:+ 2185:b 2182:( 2179:U 2176:= 2173:U 2170:d 2166:V 2161:b 2156:a 2148:+ 2145:V 2142:d 2138:U 2133:b 2128:a 2106:V 2102:U 2098:V 2094:U 2090:V 2086:U 2069:. 2064:2 2060:) 2057:+ 2054:a 2051:( 2048:f 2045:+ 2042:) 2036:a 2033:( 2030:f 2024:= 2021:) 2018:a 2015:( 2012:f 1999:a 1993:a 1989:f 1982:a 1978:f 1973:a 1967:f 1949:ρ 1941:γ 1937:γ 1933:ρ 1929:z 1925:) 1923:z 1921:( 1919:ρ 1913:γ 1909:ρ 1905:γ 1891:) 1888:t 1885:( 1859:, 1856:) 1853:t 1850:( 1844:d 1840:) 1837:) 1834:t 1831:( 1825:( 1817:b 1812:a 1794:γ 1788:R 1784:ρ 1773:R 1769:γ 1752:A 1742:A 1740:χ 1722:) 1717:A 1709:( 1697:I 1691:= 1688:) 1683:A 1675:( 1667:I 1659:) 1656:A 1653:( 1648:g 1628:g 1626:μ 1621:h 1604:, 1601:) 1598:h 1595:( 1583:I 1577:= 1574:) 1571:h 1568:( 1560:I 1528:. 1524:} 1520:f 1514:h 1511:, 1508:] 1505:b 1502:, 1499:a 1496:[ 1493:C 1487:f 1481:: 1475:) 1472:f 1469:( 1466:I 1462:{ 1455:= 1448:) 1445:h 1442:( 1430:I 1419:} 1415:h 1409:f 1403:0 1400:, 1397:] 1394:b 1391:, 1388:a 1385:[ 1382:C 1376:f 1370:: 1364:) 1361:f 1358:( 1355:I 1351:{ 1344:= 1337:) 1334:h 1331:( 1323:I 1300:I 1291:f 1272:) 1269:x 1266:( 1263:g 1260:d 1256:) 1253:x 1250:( 1247:f 1242:b 1237:a 1229:= 1226:) 1223:f 1220:( 1217:I 1202:f 1198:I 1193:g 1160:, 1157:) 1154:x 1151:( 1146:2 1142:g 1138:d 1134:) 1131:x 1128:( 1125:f 1120:b 1115:a 1104:) 1101:x 1098:( 1093:1 1089:g 1085:d 1081:) 1078:x 1075:( 1072:f 1067:b 1062:a 1054:= 1051:) 1048:x 1045:( 1042:g 1039:d 1035:) 1032:x 1029:( 1026:f 1021:b 1016:a 998:g 992:f 982:2 979:g 973:1 970:g 965:) 963:x 961:( 959:g 955:x 953:( 951:1 948:g 944:x 942:( 940:2 937:g 932:g 923:g 917:a 910:V 906:x 904:( 902:1 899:g 881:) 878:x 875:( 870:2 866:g 859:) 856:x 853:( 848:1 844:g 840:= 837:) 834:x 831:( 828:g 815:g 795:, 792:) 789:x 786:( 783:) 780:g 774:( 771:d 767:) 764:x 761:( 758:f 753:b 748:a 734:) 731:x 728:( 725:g 722:d 718:) 715:x 712:( 709:f 704:b 699:a 681:g 675:g 673:μ 666:f 643:) 640:x 637:( 634:g 631:d 627:) 624:x 621:( 618:f 613:b 608:a 587:g 579:E 557:} 551:i 547:I 541:i 530:E 524:: 518:) 513:i 509:I 505:( 500:g 490:i 481:{ 474:= 471:) 468:E 465:( 460:g 432:g 430:μ 425:I 421:w 415:g 413:μ 399:b 395:w 390:) 388:s 386:( 384:g 380:t 378:( 376:g 372:t 370:, 368:s 364:w 359:g 353:a 349:w 344:) 342:s 340:( 338:g 334:t 332:( 330:g 326:t 322:s 318:w 313:g 307:f 293:g 287:f 266:R 258:] 254:b 251:, 248:a 244:[ 240:: 237:g 221:- 204:R 196:] 192:b 189:, 186:a 182:[ 178:: 175:f 152:) 149:x 146:( 143:g 140:d 136:) 133:x 130:( 127:f 122:b 117:a

Index

measure-theoretic
analysis
mathematics
Riemann–Stieltjes
Lebesgue integration
bounded variation
regular Borel measure
integrals
Henri Leon Lebesgue
Thomas Joannes Stieltjes
Johann Radon
probability
stochastic processes
analysis
potential theory
Borel
measurable
bounded
bounded variation
monotone
right-continuous
Carathéodory's extension theorem
outer measure
metric outer measure
infimum
Lebesgue integral
total variation
Hewitt & Stromberg 1965
Daniell integral
functional

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