Knowledge (XXG)

Laver function

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203: 244: 273: 141:, ≤) the following holds: κ is supercompact and remains supercompact after forcing with any κ-directed closed forcing. 129:
The original application of Laver functions was the following theorem of Laver. If κ is supercompact, there is a κ-c.c.
164: 237: 278: 268: 230: 130: 36: 145: 106: 263: 214: 181: 173: 162:(1978). "Making the supercompactness of κ indestructible under κ-directed closed forcing". 185: 114: 257: 159: 32: 144:
There are many other applications, for example the proof of the consistency of the
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If κ is a supercompact cardinal, a Laver function is a function
218: 66:)| + κ there is a supercompact measure 238: 8: 80:is the associated elementary embedding then 245: 231: 62:and every cardinal λ ≥ |TC( 7: 199: 197: 137:, ≤) such after forcing with ( 16:Mathematical function in set theory 217:. You can help Knowledge (XXG) by 14: 201: 35:) is a function connected with 105:denotes the κ-th level of the 1: 165:Israel Journal of Mathematics 31:, named after its inventor, 295: 196: 58:such that for every set 274:Functions and mappings 213:-related article is a 37:supercompact cardinals 146:proper forcing axiom 107:cumulative hierarchy 178:10.1007/bf02761175 115:transitive closure 226: 225: 70:on such that if 286: 279:Set theory stubs 247: 240: 233: 205: 198: 189: 294: 293: 289: 288: 287: 285: 284: 283: 269:Large cardinals 254: 253: 252: 251: 194: 192: 158: 154: 127: 104: 89: 79: 57: 51::κ →  45: 17: 12: 11: 5: 292: 290: 282: 281: 276: 271: 266: 256: 255: 250: 249: 242: 235: 227: 224: 223: 206: 191: 190: 172:(4): 385–388. 160:Laver, Richard 155: 153: 150: 126: 123: 102: 84: 74: 55: 44: 41: 25:Laver function 15: 13: 10: 9: 6: 4: 3: 2: 291: 280: 277: 275: 272: 270: 267: 265: 262: 261: 259: 248: 243: 241: 236: 234: 229: 228: 222: 220: 216: 212: 207: 204: 200: 195: 187: 183: 179: 175: 171: 167: 166: 161: 157: 156: 151: 149: 147: 142: 140: 136: 132: 124: 122: 120: 116: 112: 108: 101: 97: 93: 88: 83: 78: 73: 69: 65: 61: 54: 50: 42: 40: 38: 34: 33:Richard Laver 30: 29:Laver diamond 26: 22: 219:expanding it 208: 193: 169: 163: 143: 138: 134: 128: 125:Applications 118: 110: 99: 95: 91: 86: 81: 76: 71: 67: 63: 59: 52: 48: 46: 28: 24: 18: 264:Set theory 258:Categories 211:set theory 186:0381.03039 152:References 43:Definition 21:set theory 113:) is the 133:notion ( 98:. (Here 131:forcing 94:)(κ) = 184:  85:  75:  209:This 109:, TC( 215:stub 27:(or 23:, a 182:Zbl 174:doi 117:of 19:In 260:: 180:. 170:29 168:. 148:. 121:) 39:. 246:e 239:t 232:v 221:. 188:. 176:: 139:P 135:P 119:x 111:x 103:κ 100:V 96:x 92:ƒ 90:( 87:U 82:j 77:U 72:j 68:U 64:x 60:x 56:κ 53:V 49:ƒ

Index

set theory
Richard Laver
supercompact cardinals
cumulative hierarchy
transitive closure
forcing
proper forcing axiom
Laver, Richard
Israel Journal of Mathematics
doi
10.1007/bf02761175
Zbl
0381.03039
Stub icon
set theory
stub
expanding it
v
t
e
Categories
Set theory
Large cardinals
Functions and mappings
Set theory stubs

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