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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zfinf2 4511 |
. . 3
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2 | intexabim 4085 |
. . 3
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3 | 1, 2 | ax-mp 5 |
. 2
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4 | dfom3 4514 |
. . 3
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5 | 4 | eleq1i 2206 |
. 2
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6 | 3, 5 | mpbir 145 |
1
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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 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-iinf 4510 |
This theorem depends on definitions: df-bi 116 df-tru 1335 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ral 2422 df-v 2691 df-in 3082 df-ss 3089 df-int 3780 df-iom 4513 |
This theorem is referenced by: peano5 4520 omelon 4530 frecex 6299 frecabex 6303 fict 6770 infnfi 6797 ominf 6798 inffiexmid 6808 omp1eom 6988 difinfsn 6993 0ct 7000 ctmlemr 7001 ctssdclemn0 7003 ctssdclemr 7005 ctssdc 7006 enumct 7008 omct 7010 ctfoex 7011 exmidlpo 7023 infnninf 7030 nnnninf 7031 cc2lem 7098 niex 7144 enq0ex 7271 nq0ex 7272 uzenom 10229 frecfzennn 10230 nnenom 10238 fxnn0nninf 10242 0tonninf 10243 1tonninf 10244 inftonninf 10245 hashinfuni 10555 hashinfom 10556 xpct 11945 ennnfonelemj0 11950 ennnfonelemg 11952 ennnfonelemen 11970 ctiunct 11989 omctfn 11992 subctctexmid 13369 0nninf 13372 nnsf 13374 peano4nninf 13375 peano3nninf 13376 nninfex 13380 nninfself 13384 nninfsellemeq 13385 nninfsellemeqinf 13387 sbthom 13396 |
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