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| Mirrors > Home > MPE Home > Th. List > nnenom | Structured version Visualization version GIF version | ||
| Description: The set of positive integers (as a subset of complex numbers) is equinumerous to omega (the set of finite ordinal numbers). (Contributed by NM, 31-Jul-2004.) (Revised by Mario Carneiro, 15-Sep-2013.) |
| Ref | Expression |
|---|---|
| nnenom | ⊢ ℕ ≈ ω |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | omex 9668 | . . 3 ⊢ ω ∈ V | |
| 2 | nn0ex 12636 | . . 3 ⊢ ℕ0 ∈ V | |
| 3 | eqid 2763 | . . . 4 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) = (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) | |
| 4 | 3 | hashgf1o 14138 | . . 3 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω):ω⟶1-1ontoℕ0 |
| 5 | f1oen2g 9020 | . . 3 ⊢ ((ω ∈ V ∧ ℕ0 ∈ V ∧ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω):ω⟶1-1ontoℕ0) → ω ≈ ℕ0) | |
| 6 | 1, 2, 4, 5 | mp3an 1491 | . 2 ⊢ ω ≈ ℕ0 |
| 7 | nn0ennn 14146 | . 2 ⊢ ℕ0 ≈ ℕ | |
| 8 | 6, 7 | entr2i 9061 | 1 ⊢ ℕ ≈ ω |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2147 Vcvv 3454 class class class wbr 5106 ↦ cmpt 5189 ↾ cres 5657 ⟶1-1ontowf1o 6554 (class class class)co 7440 ωcom 7898 reccrdg 8442 ≈ cen 8995 0cc0 11224 1c1 11225 + caddc 11227 ℕcn 12359 ℕ0cn0 12630 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7772 ax-inf2 9666 ax-cnex 11280 ax-resscn 11281 ax-1cn 11282 ax-icn 11283 ax-addcl 11284 ax-addrcl 11285 ax-mulcl 11286 ax-mulrcl 11287 ax-mulcom 11288 ax-addass 11289 ax-mulass 11290 ax-distr 11291 ax-i2m1 11292 ax-1ne0 11293 ax-1rid 11294 ax-rnegex 11295 ax-rrecex 11296 ax-cnre 11297 ax-pre-lttri 11298 ax-pre-lttrn 11299 ax-pre-ltadd 11300 ax-pre-mulgt0 11301 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6319 df-ord 6380 df-on 6381 df-lim 6382 df-suc 6383 df-iota 6509 df-fun 6557 df-fn 6558 df-f 6559 df-f1 6560 df-fo 6561 df-f1o 6562 df-fv 6563 df-riota 7397 df-ov 7443 df-oprab 7444 df-mpo 7445 df-om 7899 df-2nd 8023 df-frecs 8324 df-wrecs 8355 df-recs 8404 df-rdg 8443 df-er 8742 df-en 8999 df-dom 9000 df-sdom 9001 df-pnf 11369 df-mnf 11370 df-xr 11371 df-ltxr 11372 df-le 11373 df-sub 11567 df-neg 11568 df-nn 12360 df-n0 12631 df-z 12718 df-uz 12990 |
| This theorem is used by: nnct 14148 supcvg 16051 xpnnen 16405 znnen 16406 qnnen 16407 rexpen 16422 aleph1re 16439 aleph1irr 16440 bitsf1 16642 unben 17113 odinf 19804 odhash 19815 cygctb 20133 1stcfb 23790 2ndcredom 23795 1stcelcls 23807 hauspwdom 23847 met1stc 24867 met2ndci 24868 re2ndc 25147 iscmet3 25641 ovolctb2 25840 ovolfi 25842 ovoliunlem3 25852 iunmbl2 25905 uniiccdif 25926 dyadmbl 25948 opnmblALT 25951 mbfimaopnlem 26003 itg2seq 26090 aannenlem3 26684 dirith2 27882 nmounbseqi 31406 nmobndseqi 31408 minvecolem5 31510 padct 33378 f1ocnt 33459 dmvlsiga 34828 sigapildsys 34862 volmeas 34931 omssubadd 34999 carsgclctunlem3 35019 poimirlem30 38759 poimirlem32 38761 mblfinlem1 38766 ovoliunnfl 38771 heiborlem3 38938 heibor 38946 lzenom 43972 fiphp3d 44017 irrapx1 44026 pellex 44033 nnfoctb 46268 zenom 46272 qenom 46576 ioonct 46752 caragenunicl 47737 caratheodory 47741 ovnsubaddlem2 47784 |
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