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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 9608 | . . 3 ⊢ ω ∈ V | |
| 2 | nn0ex 12514 | . . 3 ⊢ ℕ0 ∈ V | |
| 3 | eqid 2763 | . . . 4 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) = (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) | |
| 4 | 3 | hashgf1o 14012 | . . 3 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω):ω–1-1-onto→ℕ0 |
| 5 | f1oen2g 8961 | . . 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 14020 | . 2 ⊢ ℕ0 ≈ ℕ | |
| 8 | 6, 7 | entr2i 9002 | 1 ⊢ ℕ ≈ ω |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2143 Vcvv 3455 class class class wbr 5109 ↦ cmpt 5192 ↾ cres 5663 –1-1-onto→wf1o 6535 (class class class)co 7410 ωcom 7858 reccrdg 8392 ≈ cen 8936 0cc0 11104 1c1 11105 + caddc 11107 ℕcn 12237 ℕ0cn0 12508 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-inf2 9606 ax-cnex 11160 ax-resscn 11161 ax-1cn 11162 ax-icn 11163 ax-addcl 11164 ax-addrcl 11165 ax-mulcl 11166 ax-mulrcl 11167 ax-mulcom 11168 ax-addass 11169 ax-mulass 11170 ax-distr 11171 ax-i2m1 11172 ax-1ne0 11173 ax-1rid 11174 ax-rnegex 11175 ax-rrecex 11176 ax-cnre 11177 ax-pre-lttri 11178 ax-pre-lttrn 11179 ax-pre-ltadd 11180 ax-pre-mulgt0 11181 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11447 df-neg 11448 df-nn 12238 df-n0 12509 df-z 12596 df-uz 12867 |
| This theorem is used by: nnct 14022 supcvg 15915 xpnnen 16271 znnen 16272 qnnen 16273 rexpen 16288 aleph1re 16305 aleph1irr 16306 bitsf1 16508 unben 16973 odinf 19637 odhash 19648 cygctb 19966 1stcfb 23611 2ndcredom 23616 1stcelcls 23627 hauspwdom 23667 met1stc 24687 met2ndci 24688 re2ndc 24967 iscmet3 25461 ovolctb2 25660 ovolfi 25662 ovoliunlem3 25672 iunmbl2 25725 uniiccdif 25746 dyadmbl 25768 opnmblALT 25771 mbfimaopnlem 25823 itg2seq 25910 aannenlem3 26502 dirith2 27701 nmounbseqi 31138 nmobndseqi 31140 minvecolem5 31242 padct 33072 f1ocnt 33154 dmvlsiga 34528 sigapildsys 34561 volmeas 34630 omssubadd 34699 carsgclctunlem3 34719 poimirlem30 38329 poimirlem32 38331 mblfinlem1 38336 ovoliunnfl 38341 heiborlem3 38492 heibor 38500 lzenom 43529 fiphp3d 43574 irrapx1 43583 pellex 43590 nnfoctb 45796 zenom 45800 qenom 46105 ioonct 46281 subsaliuncl 47100 caragenunicl 47266 caratheodory 47270 ovnsubaddlem2 47313 |
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