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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 9620 | . . 3 ⊢ ω ∈ V | |
| 2 | nn0ex 12530 | . . 3 ⊢ ℕ0 ∈ V | |
| 3 | eqid 2765 | . . . 4 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) = (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) | |
| 4 | 3 | hashgf1o 14030 | . . 3 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω):ω–1-1-onto→ℕ0 |
| 5 | f1oen2g 8972 | . . 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 14038 | . 2 ⊢ ℕ0 ≈ ℕ | |
| 8 | 6, 7 | entr2i 9013 | 1 ⊢ ℕ ≈ ω |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2146 Vcvv 3457 class class class wbr 5111 ↦ cmpt 5194 ↾ cres 5665 –1-1-onto→wf1o 6540 (class class class)co 7420 ωcom 7869 reccrdg 8403 ≈ cen 8947 0cc0 11120 1c1 11121 + caddc 11123 ℕcn 12253 ℕ0cn0 12524 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7743 ax-inf2 9618 ax-cnex 11176 ax-resscn 11177 ax-1cn 11178 ax-icn 11179 ax-addcl 11180 ax-addrcl 11181 ax-mulcl 11182 ax-mulrcl 11183 ax-mulcom 11184 ax-addass 11185 ax-mulass 11186 ax-distr 11187 ax-i2m1 11188 ax-1ne0 11189 ax-1rid 11190 ax-rnegex 11191 ax-rrecex 11192 ax-cnre 11193 ax-pre-lttri 11194 ax-pre-lttrn 11195 ax-pre-ltadd 11196 ax-pre-mulgt0 11197 |
| 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 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6307 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6497 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7870 df-2nd 7994 df-frecs 8285 df-wrecs 8316 df-recs 8365 df-rdg 8404 df-er 8701 df-en 8951 df-dom 8952 df-sdom 8953 df-pnf 11265 df-mnf 11266 df-xr 11267 df-ltxr 11268 df-le 11269 df-sub 11463 df-neg 11464 df-nn 12254 df-n0 12525 df-z 12612 df-uz 12884 |
| This theorem is used by: nnct 14040 supcvg 15938 xpnnen 16294 znnen 16295 qnnen 16296 rexpen 16311 aleph1re 16328 aleph1irr 16329 bitsf1 16531 unben 16996 odinf 19682 odhash 19693 cygctb 20011 1stcfb 23657 2ndcredom 23662 1stcelcls 23674 hauspwdom 23714 met1stc 24734 met2ndci 24735 re2ndc 25014 iscmet3 25508 ovolctb2 25707 ovolfi 25709 ovoliunlem3 25719 iunmbl2 25772 uniiccdif 25793 dyadmbl 25815 opnmblALT 25818 mbfimaopnlem 25870 itg2seq 25957 aannenlem3 26549 dirith2 27748 nmounbseqi 31205 nmobndseqi 31207 minvecolem5 31309 padct 33138 f1ocnt 33220 dmvlsiga 34588 sigapildsys 34622 volmeas 34691 omssubadd 34760 carsgclctunlem3 34780 poimirlem30 38363 poimirlem32 38365 mblfinlem1 38370 ovoliunnfl 38375 heiborlem3 38527 heibor 38535 lzenom 43579 fiphp3d 43624 irrapx1 43633 pellex 43640 nnfoctb 45846 zenom 45850 qenom 46155 ioonct 46331 subsaliuncl 47150 caragenunicl 47316 caratheodory 47320 ovnsubaddlem2 47363 |
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