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Normal measure

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construction. Equivalently, if f:κ→κ is such that f(α)<α for most α<κ, then there is a β<κ such that f(α)=β for most α<κ. (Here, "most" means that the set of elements of κ where the property holds is a member of the ultrafilter, i.e. has measure 1.) Also equivalent, the ultrafilter (set
44:(club) subset of κ contains most ordinals less than κ and any subset containing most ordinals less than κ is stationary in κ. 71: 96: 91: 34: 8: 61: 25: 28:κ such that the equivalence class of the identity function on κ maps to κ itself in the 47:
If an uncountable cardinal κ has a measure on it, then it has a normal measure on it.
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The Higher Infinite : Large Cardinals in Set Theory from Their Beginnings
85: 29: 17: 41: 83: 56: 84: 33:of sets of measure 1) is closed under 13: 14: 108: 1: 50: 7: 10: 113: 66:(1st ed.). Springer. 40:For a normal measure, any 97:Measures (set theory) 35:diagonal intersection 26:measurable cardinal 24:is a measure on a 58:Kanamori, Akihiro 104: 77: 42:closed unbounded 112: 111: 107: 106: 105: 103: 102: 101: 92:Large cardinals 82: 81: 74: 53: 12: 11: 5: 110: 100: 99: 94: 80: 79: 72: 52: 49: 22:normal measure 9: 6: 4: 3: 2: 109: 98: 95: 93: 90: 89: 87: 75: 73:3-540-57071-3 69: 65: 64: 59: 55: 54: 48: 45: 43: 38: 36: 31: 27: 23: 19: 62: 46: 39: 21: 15: 86:Categories 51:References 30:ultrapower 18:set theory 78:pp 52–53 60:(2003). 70:  68:ISBN 20:, a 16:In 88:: 37:. 76:.

Index

set theory
measurable cardinal
ultrapower
diagonal intersection
closed unbounded
Kanamori, Akihiro
The Higher Infinite : Large Cardinals in Set Theory from Their Beginnings
ISBN
3-540-57071-3
Categories
Large cardinals
Measures (set theory)

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