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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 9644 | . . 3 ⊢ ω ∈ V | |
| 2 | nn0ex 12612 | . . 3 ⊢ ℕ0 ∈ V | |
| 3 | eqid 2760 | . . . 4 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) = (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) | |
| 4 | 3 | hashgf1o 14114 | . . 3 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω):ω–1-1-onto→ℕ0 |
| 5 | f1oen2g 8995 | . . 3 ⊢ ((ω ∈ V ∧ ℕ0 ∈ V ∧ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω):ω–1-1-onto→ℕ0) → ω ≈ ℕ0) | |
| 6 | 1, 2, 4, 5 | mp3an 1490 | . 2 ⊢ ω ≈ ℕ0 |
| 7 | nn0ennn 14122 | . 2 ⊢ ℕ0 ≈ ℕ | |
| 8 | 6, 7 | entr2i 9036 | 1 ⊢ ℕ ≈ ω |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2144 Vcvv 3450 class class class wbr 5102 ↦ cmpt 5185 ↾ cres 5652 –1-1-onto→wf1o 6537 (class class class)co 7420 ωcom 7877 reccrdg 8417 ≈ cen 8970 0cc0 11200 1c1 11201 + caddc 11203 ℕcn 12335 ℕ0cn0 12606 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-inf2 9642 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-2nd 8002 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-nn 12336 df-n0 12607 df-z 12694 df-uz 12966 |
| This theorem is used by: nnct 14124 supcvg 16025 xpnnen 16379 znnen 16380 qnnen 16381 rexpen 16396 aleph1re 16413 aleph1irr 16414 bitsf1 16616 unben 17087 odinf 19777 odhash 19788 cygctb 20106 1stcfb 23763 2ndcredom 23768 1stcelcls 23780 hauspwdom 23820 met1stc 24840 met2ndci 24841 re2ndc 25120 iscmet3 25614 ovolctb2 25813 ovolfi 25815 ovoliunlem3 25825 iunmbl2 25878 uniiccdif 25899 dyadmbl 25921 opnmblALT 25924 mbfimaopnlem 25976 itg2seq 26063 aannenlem3 26657 dirith2 27855 nmounbseqi 31379 nmobndseqi 31381 minvecolem5 31483 padct 33310 f1ocnt 33392 dmvlsiga 34761 sigapildsys 34795 volmeas 34864 omssubadd 34932 carsgclctunlem3 34952 poimirlem30 38569 poimirlem32 38571 mblfinlem1 38576 ovoliunnfl 38581 heiborlem3 38748 heibor 38756 lzenom 43781 fiphp3d 43826 irrapx1 43835 pellex 43842 nnfoctb 46065 zenom 46069 qenom 46373 ioonct 46549 caragenunicl 47534 caratheodory 47538 ovnsubaddlem2 47581 |
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