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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 4736 |
. . 3
| |
| 2 | intexabim 4288 |
. . 3
| |
| 3 | 1, 2 | ax-mp 5 |
. 2
|
| 4 | dfom3 4739 |
. . 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 4249 ax-iinf 4735 |
| 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 4738 |
| This theorem is used by: peano5 4745 omelon 4756 frecex 6665 frecabex 6669 fict 7170 infnfi 7199 ominf 7200 inffiexmid 7213 omp1eom 7435 difinfsn 7440 0ct 7447 ctmlemr 7448 ctssdclemn0 7450 ctssdclemr 7452 ctssdc 7453 enumct 7455 omct 7457 ctfoex 7458 nninfex 7461 infnninf 7464 infnninfOLD 7465 nnnninf 7466 exmidlpo 7483 nninfdcinf 7511 nninfwlporlem 7513 nninfwlpoimlemg 7515 nninfwlpoim 7519 nninfinfwlpo 7520 cc2lem 7632 acnccim 7638 niex 7679 enq0ex 7806 nq0ex 7807 uzenom 10875 frecfzennn 10876 nnenom 10884 fxnn0nninf 10889 0tonninf 10890 1tonninf 10891 inftonninf 10892 nninfinf 10893 hashinfuni 11230 hashinfom 11231 nninfctlemfo 12833 nninfct 12834 xpct 13336 ennnfonelemj0 13341 ennnfonelemg 13343 ennnfonelemen 13361 ctiunct 13380 omctfn 13383 ssomct 13385 bj-charfunbi 16935 subctctexmid 17128 0nninf 17145 nnsf 17146 peano4nninf 17147 peano3nninf 17148 nninfself 17154 nninfsellemeq 17155 nninfsellemeqinf 17157 sbthom 17169 |
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