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Slicing the Truth

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This is a technical monograph, requiring its readers to have some familiarity with computability theory and Ramsey theory. Prior knowledge of reverse mathematics is not required. It is written in a somewhat informal style, and includes many exercises, making it usable as a graduate textbook or
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beginning work in reverse mathematics; reviewer François Dorais writes that it is an "excellent introduction to reverse mathematics and the computability theory of combinatorial principles" as well as a case study in the methods available for proving results in reverse mathematics.
185:. Nevertheless he recommends this book to anyone interested in reverse mathematics and Ramsey theory. And reviewer Benedict Eastaugh calls it "a welcome addition ... providing a fresh and accessible look at a central aspect of contemporary reverse mathematical research." 141:) are only the ones that are already provably in the weaker theory. Chapter eight summarizes the results so far in diagrammatic form. Chapter nine discusses ways to weaken Ramsey's theorem, and the final chapter discusses stronger theorems in combinatorics including the 19: 201:; it is centered around the big five subsystems and contains many more examples of results equivalent in strength to one of these five. Dorais suggests using the two books together as companion volumes. 137:
of theories, in which the statements of a powerful theory (such as one of the forms of second-order arithmetic) that are both provable in that theory and expressible in a weaker theory (such as
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complains about two missing topics, the work of Joe Mileti on the reverse mathematics of canonical versions of Ramsey's theorem, and the work of James Schmerl on the reverse mathematics of
165:. An appendix provides a proof of a theorem of Jiayi Liu, part of the collection of results showing that the graph Ramsey theorem does not fall into the big five subsystems. 122:, and it turns out to be inequivalent to any one of the big five subsystems. The version for uniform hypergraphs of fixed order greater than two is equivalent to ACA 71:
into which many theorems of mathematics have been classified. These chapters also review some of the tools needed in this study, including
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needed to prove combinatorial theorems. It was written by Denis R. Hirschfeldt, based on a course given by Hirschfeldt at the
476: 198: 51:, as volume 28 of the Lecture Notes Series of the Institute for Mathematical Sciences, National University of Singapore. 466: 142: 486: 236: 146: 87: 28:
Slicing the Truth: On the Computability Theoretic and Reverse Mathematical Analysis of Combinatorial Principles
63:, which has the goal of classifying mathematical theorems by the axiom schemes needed to prove them, and the 68: 481: 134: 471: 76: 425: 362: 72: 91: 64: 60: 32: 430: 328: 253: 150: 80: 420: 412: 320: 266: 245: 103: 48: 371: 367: 311: 295: 270: 178: 154: 182: 115: 299: 460: 403: 95: 36: 332: 257: 450: 434: 158: 138: 18: 208:
by Rebecca Weber as a good source for the background needed to read this book.
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originally proved, the version of the theorem for graphs is weaker than ACA
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Chapter six, "the real heart of the book", applies this method to an
394: 453:, Hirschfeldt's web site, including a preprint version of the book. 40: 17: 102:, using finitely many colors, contains a monochromatic infinite 59:
The book begins with five chapters that discuss the field of
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of a countably infinite complete graph or complete uniform
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A "classic reference" in reverse mathematics is the book
110:, falling into one of the big five subsystems, ACA 145:on self-embedding of infinite linear orderings, 230:Hirst, Jeffry L. (September 2015), "Review of 106:. The standard proof of this theorem uses the 8: 388: 386: 384: 382: 380: 426:1983/1ed76e2d-9bc7-4529-b628-92791f631317 424: 290: 288: 286: 284: 282: 280: 278: 351: 349: 347: 345: 343: 341: 225: 223: 221: 217: 261:; see also Hirst's shorter review for 195:Subsystems of Second Order Arithmetic 7: 47:in 2010, and published in 2014 by 14: 393:Eastaugh, Benedict (July 2017), 356:Dorais, François G., "Review of 108:arithmetical comprehension axiom 45:National University of Singapore 204:Reviewer Jeffry Hirst suggests 1: 161:, and Hindman's theorem on 508: 237:Bulletin of Symbolic Logic 417:10.1007/s11225-017-9740-1 133:Chapter seven discusses 325:10.1145/2902945.2902952 135:conservative extensions 69:second-order arithmetic 492:2014 non-fiction books 169:Audience and reception 147:Kruskal's tree theorem 143:Dushnik–Miller theorem 23: 21: 477:Computability theory 363:Mathematical Reviews 206:Computability Theory 73:computability theory 250:10.1017/bsl.2015.18 65:big five subsystems 61:reverse mathematics 39:, the study of the 33:reverse mathematics 467:Mathematical logic 24: 487:Mathematics books 451:Slicing the Truth 397:Slicing the Truth 358:Slicing the Truth 302:Slicing the Truth 232:Slicing the Truth 81:low basis theorem 499: 438: 437: 428: 390: 375: 374: 353: 336: 335: 308: 296:Gasarch, William 292: 273: 260: 227: 139:Peano arithmetic 104:induced subgraph 92:Ramsey's theorem 49:World Scientific 507: 506: 502: 501: 500: 498: 497: 496: 457: 456: 447: 442: 441: 392: 391: 378: 355: 354: 339: 312:ACM SIGACT News 306: 294: 293: 276: 229: 228: 219: 214: 199:Stephen Simpson 191: 189:Related reading 179:William Gasarch 171: 155:order embedding 151:Laver's theorem 129: 125: 121: 113: 57: 12: 11: 5: 505: 503: 495: 494: 489: 484: 479: 474: 469: 459: 458: 455: 454: 446: 445:External links 443: 440: 439: 411:(4): 873–879, 376: 337: 298:(March 2016), 274: 244:(3): 338–339, 216: 215: 213: 210: 190: 187: 183:graph coloring 170: 167: 127: 123: 119: 116:David Seetapun 114:. However, as 111: 56: 53: 13: 10: 9: 6: 4: 3: 2: 504: 493: 490: 488: 485: 483: 482:Ramsey theory 480: 478: 475: 473: 470: 468: 465: 464: 462: 452: 449: 448: 444: 436: 432: 427: 422: 418: 414: 410: 406: 405: 404:Studia Logica 400: 398: 389: 387: 385: 383: 381: 377: 373: 369: 365: 364: 359: 352: 350: 348: 346: 344: 342: 338: 334: 330: 326: 322: 318: 314: 313: 305: 303: 297: 291: 289: 287: 285: 283: 281: 279: 275: 272: 268: 264: 259: 255: 251: 247: 243: 239: 238: 233: 226: 224: 222: 218: 211: 209: 207: 202: 200: 196: 188: 186: 184: 180: 175: 168: 166: 164: 160: 159:linear orders 157:of countable 156: 152: 148: 144: 140: 136: 131: 117: 109: 105: 101: 97: 96:edge coloring 93: 89: 84: 82: 78: 74: 70: 66: 62: 54: 52: 50: 46: 42: 38: 37:combinatorics 34: 31:is a book on 30: 29: 22:First edition 20: 16: 472:Proof theory 408: 402: 396: 361: 357: 319:(1): 21–24, 316: 310: 301: 241: 235: 231: 205: 203: 194: 192: 176: 172: 132: 85: 58: 27: 26: 25: 15: 395:"Review of 300:"Review of 461:Categories 271:1304.03001 212:References 197:(2009) by 100:hypergraph 88:infinitary 79:, and the 177:Reviewer 333:19457072 258:61188908 94:: every 90:form of 435:1667765 372:3244278 163:IP sets 77:forcing 433:  370:  331:  269:  263:zbMATH 256:  55:Topics 41:axioms 431:S2CID 329:S2CID 307:(PDF) 254:S2CID 421:hdl 413:doi 409:105 360:", 321:doi 267:Zbl 246:doi 234:", 153:on 67:of 35:in 463:: 429:, 419:, 407:, 401:, 379:^ 368:MR 366:, 340:^ 327:, 317:47 315:, 309:, 277:^ 265:, 252:, 242:21 240:, 220:^ 149:, 130:. 83:. 75:, 423:: 415:: 399:" 323:: 304:" 248:: 128:0 124:0 120:0 112:0

Index


reverse mathematics
combinatorics
axioms
National University of Singapore
World Scientific
reverse mathematics
big five subsystems
second-order arithmetic
computability theory
forcing
low basis theorem
infinitary
Ramsey's theorem
edge coloring
hypergraph
induced subgraph
arithmetical comprehension axiom
David Seetapun
conservative extensions
Peano arithmetic
Dushnik–Miller theorem
Kruskal's tree theorem
Laver's theorem
order embedding
linear orders
IP sets
William Gasarch
graph coloring
Stephen Simpson

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