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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 4738 |
. . 3
| |
| 2 | intexabim 4290 |
. . 3
| |
| 3 | 1, 2 | ax-mp 5 |
. 2
|
| 4 | dfom3 4741 |
. . 3
| |
| 5 | 4 | eleq1i 2304 |
. 2
|
| 6 | 3, 5 | mpbir 146 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-sep 4251 ax-iinf 4737 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-v 2823 df-in 3226 df-ss 3233 df-int 3971 df-iom 4740 |
| This theorem is used by: peano5 4747 omelon 4758 frecex 6669 frecabex 6673 fict 7174 infnfi 7203 ominf 7204 inffiexmid 7217 omp1eom 7441 difinfsn 7446 0ct 7453 ctmlemr 7454 ctssdclemn0 7456 ctssdclemr 7458 ctssdc 7459 enumct 7461 omct 7463 ctfoex 7464 nninfex 7467 infnninf 7470 infnninfOLD 7471 nnnninf 7472 exmidlpo 7489 nninfdcinf 7517 nninfwlporlem 7519 nninfwlpoimlemg 7521 nninfwlpoim 7525 nninfinfwlpo 7526 cc2lem 7638 acnccim 7644 niex 7685 enq0ex 7812 nq0ex 7813 uzenom 10883 frecfzennn 10884 nnenom 10892 fxnn0nninf 10897 0tonninf 10898 1tonninf 10899 inftonninf 10900 nninfinf 10901 hashinfuni 11238 hashinfom 11239 nninfctlemfo 12842 nninfct 12843 xpct 13345 ennnfonelemj0 13350 ennnfonelemg 13352 ennnfonelemen 13370 ctiunct 13389 omctfn 13392 ssomct 13394 bj-charfunbi 17042 subctctexmid 17235 0nninf 17253 nnsf 17254 peano4nninf 17255 peano3nninf 17256 nninfself 17262 nninfsellemeq 17263 nninfsellemeqinf 17265 sbthom 17277 |
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