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Mirrors > Home > ILE Home > Th. List > omex | Unicode version |
Description: The existence of omega (the class of natural numbers). Axiom 7 of [TakeutiZaring] p. 43. (Contributed by NM, 6-Aug-1994.) |
Ref | Expression |
---|---|
omex |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zfinf2 4330 | . . 3 | |
2 | intexabim 3927 | . . 3 | |
3 | 1, 2 | ax-mp 7 | . 2 |
4 | dfom3 4333 | . . 3 | |
5 | 4 | eleq1i 2144 | . 2 |
6 | 3, 5 | mpbir 144 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 102 wex 1421 wcel 1433 cab 2067 wral 2348 cvv 2601 c0 3251 cint 3636 csuc 4120 com 4331 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-iinf 4329 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-v 2603 df-in 2979 df-ss 2986 df-int 3637 df-iom 4332 |
This theorem is referenced by: peano5 4339 omelon 4349 frecex 6004 frecabex 6007 niex 6502 enq0ex 6629 nq0ex 6630 uzenom 9418 frecfzennn 9419 nnenom 9426 |
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