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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 9566 | . . 3 ⊢ ω ∈ V | |
| 2 | nn0ex 12421 | . . 3 ⊢ ℕ0 ∈ V | |
| 3 | eqid 2737 | . . . 4 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) = (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) | |
| 4 | 3 | hashgf1o 13908 | . . 3 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω):ω–1-1-onto→ℕ0 |
| 5 | f1oen2g 8919 | . . 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 1464 | . 2 ⊢ ω ≈ ℕ0 |
| 7 | nn0ennn 13916 | . 2 ⊢ ℕ0 ≈ ℕ | |
| 8 | 6, 7 | entr2i 8960 | 1 ⊢ ℕ ≈ ω |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 Vcvv 3442 class class class wbr 5100 ↦ cmpt 5181 ↾ cres 5636 –1-1-onto→wf1o 6501 (class class class)co 7370 ωcom 7820 reccrdg 8352 ≈ cen 8894 0cc0 11040 1c1 11041 + caddc 11043 ℕcn 12159 ℕ0cn0 12415 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5245 ax-nul 5255 ax-pow 5314 ax-pr 5381 ax-un 7692 ax-inf2 9564 ax-cnex 11096 ax-resscn 11097 ax-1cn 11098 ax-icn 11099 ax-addcl 11100 ax-addrcl 11101 ax-mulcl 11102 ax-mulrcl 11103 ax-mulcom 11104 ax-addass 11105 ax-mulass 11106 ax-distr 11107 ax-i2m1 11108 ax-1ne0 11109 ax-1rid 11110 ax-rnegex 11111 ax-rrecex 11112 ax-cnre 11113 ax-pre-lttri 11114 ax-pre-lttrn 11115 ax-pre-ltadd 11116 ax-pre-mulgt0 11117 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5529 df-eprel 5534 df-po 5542 df-so 5543 df-fr 5587 df-we 5589 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-res 5646 df-ima 5647 df-pred 6269 df-ord 6330 df-on 6331 df-lim 6332 df-suc 6333 df-iota 6458 df-fun 6504 df-fn 6505 df-f 6506 df-f1 6507 df-fo 6508 df-f1o 6509 df-fv 6510 df-riota 7327 df-ov 7373 df-oprab 7374 df-mpo 7375 df-om 7821 df-2nd 7946 df-frecs 8235 df-wrecs 8266 df-recs 8315 df-rdg 8353 df-er 8647 df-en 8898 df-dom 8899 df-sdom 8900 df-pnf 11182 df-mnf 11183 df-xr 11184 df-ltxr 11185 df-le 11186 df-sub 11380 df-neg 11381 df-nn 12160 df-n0 12416 df-z 12503 df-uz 12766 |
| This theorem is referenced by: nnct 13918 supcvg 15793 xpnnen 16150 znnen 16151 qnnen 16152 rexpen 16167 aleph1re 16184 aleph1irr 16185 bitsf1 16387 unben 16851 odinf 19509 odhash 19520 cygctb 19838 1stcfb 23406 2ndcredom 23411 1stcelcls 23422 hauspwdom 23462 met1stc 24482 met2ndci 24483 re2ndc 24762 iscmet3 25266 ovolctb2 25466 ovolfi 25468 ovoliunlem3 25478 iunmbl2 25531 uniiccdif 25552 dyadmbl 25574 opnmblALT 25577 mbfimaopnlem 25629 itg2seq 25716 aannenlem3 26311 dirith2 27512 nmounbseqi 30871 nmobndseqi 30873 minvecolem5 30975 padct 32814 f1ocnt 32897 dmvlsiga 34313 sigapildsys 34346 volmeas 34415 omssubadd 34484 carsgclctunlem3 34504 poimirlem30 37930 poimirlem32 37932 mblfinlem1 37937 ovoliunnfl 37942 heiborlem3 38093 heibor 38101 lzenom 43156 fiphp3d 43205 irrapx1 43214 pellex 43221 nnfoctb 45437 zenom 45441 qenom 45749 ioonct 45926 subsaliuncl 46745 caragenunicl 46911 caratheodory 46915 ovnsubaddlem2 46958 |
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