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| 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 4711 |
. . 3
| |
| 2 | intexabim 4264 |
. . 3
| |
| 3 | 1, 2 | ax-mp 5 |
. 2
|
| 4 | dfom3 4714 |
. . 3
| |
| 5 | 4 | eleq1i 2298 |
. 2
|
| 6 | 3, 5 | mpbir 146 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 ax-sep 4228 ax-iinf 4710 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-v 2815 df-in 3217 df-ss 3224 df-int 3950 df-iom 4713 |
| This theorem is referenced by: peano5 4720 omelon 4731 frecex 6625 frecabex 6629 fict 7123 infnfi 7152 ominf 7153 inffiexmid 7166 omp1eom 7386 difinfsn 7391 0ct 7398 ctmlemr 7399 ctssdclemn0 7401 ctssdclemr 7403 ctssdc 7404 enumct 7406 omct 7408 ctfoex 7409 nninfex 7412 infnninf 7415 infnninfOLD 7416 nnnninf 7417 exmidlpo 7434 nninfdcinf 7462 nninfwlporlem 7464 nninfwlpoimlemg 7466 nninfwlpoim 7470 nninfinfwlpo 7471 cc2lem 7580 acnccim 7586 niex 7627 enq0ex 7754 nq0ex 7755 uzenom 10787 frecfzennn 10788 nnenom 10796 fxnn0nninf 10801 0tonninf 10802 1tonninf 10803 inftonninf 10804 nninfinf 10805 hashinfuni 11140 hashinfom 11141 nninfctlemfo 12736 nninfct 12737 xpct 13147 ennnfonelemj0 13152 ennnfonelemg 13154 ennnfonelemen 13172 ctiunct 13191 omctfn 13194 ssomct 13196 bj-charfunbi 16581 subctctexmid 16774 0nninf 16782 nnsf 16783 peano4nninf 16784 peano3nninf 16785 nninfself 16791 nninfsellemeq 16792 nninfsellemeqinf 16794 sbthom 16806 |
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