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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 9629 | . . 3 ⊢ ω ∈ V | |
| 2 | nn0ex 12559 | . . 3 ⊢ ℕ0 ∈ V | |
| 3 | eqid 2760 | . . . 4 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) = (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) | |
| 4 | 3 | hashgf1o 14060 | . . 3 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω):ω–1-1-onto→ℕ0 |
| 5 | f1oen2g 8981 | . . 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 14068 | . 2 ⊢ ℕ0 ≈ ℕ | |
| 8 | 6, 7 | entr2i 9022 | 1 ⊢ ℕ ≈ ω |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 Vcvv 3450 class class class wbr 5103 ↦ cmpt 5186 ↾ cres 5657 –1-1-onto→wf1o 6534 (class class class)co 7416 ωcom 7868 reccrdg 8403 ≈ cen 8956 0cc0 11149 1c1 11150 + caddc 11152 ℕcn 12282 ℕ0cn0 12553 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7742 ax-inf2 9627 ax-cnex 11205 ax-resscn 11206 ax-1cn 11207 ax-icn 11208 ax-addcl 11209 ax-addrcl 11210 ax-mulcl 11211 ax-mulrcl 11212 ax-mulcom 11213 ax-addass 11214 ax-mulass 11215 ax-distr 11216 ax-i2m1 11217 ax-1ne0 11218 ax-1rid 11219 ax-rnegex 11220 ax-rrecex 11221 ax-cnre 11222 ax-pre-lttri 11223 ax-pre-lttrn 11224 ax-pre-ltadd 11225 ax-pre-mulgt0 11226 |
| 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 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 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 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 6301 df-ord 6362 df-on 6363 df-lim 6364 df-suc 6365 df-iota 6491 df-fun 6537 df-fn 6538 df-f 6539 df-f1 6540 df-fo 6541 df-f1o 6542 df-fv 6543 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7869 df-2nd 7993 df-frecs 8285 df-wrecs 8316 df-recs 8365 df-rdg 8404 df-er 8703 df-en 8960 df-dom 8961 df-sdom 8962 df-pnf 11294 df-mnf 11295 df-xr 11296 df-ltxr 11297 df-le 11298 df-sub 11492 df-neg 11493 df-nn 12283 df-n0 12554 df-z 12641 df-uz 12913 |
| This theorem is used by: nnct 14070 supcvg 15970 xpnnen 16324 znnen 16325 qnnen 16326 rexpen 16341 aleph1re 16358 aleph1irr 16359 bitsf1 16561 unben 17026 odinf 19716 odhash 19727 cygctb 20045 1stcfb 23702 2ndcredom 23707 1stcelcls 23719 hauspwdom 23759 met1stc 24779 met2ndci 24780 re2ndc 25059 iscmet3 25553 ovolctb2 25752 ovolfi 25754 ovoliunlem3 25764 iunmbl2 25817 uniiccdif 25838 dyadmbl 25860 opnmblALT 25863 mbfimaopnlem 25915 itg2seq 26002 aannenlem3 26598 dirith2 27796 nmounbseqi 31290 nmobndseqi 31292 minvecolem5 31394 padct 33221 f1ocnt 33303 dmvlsiga 34672 sigapildsys 34706 volmeas 34775 omssubadd 34844 carsgclctunlem3 34864 poimirlem30 38464 poimirlem32 38466 mblfinlem1 38471 ovoliunnfl 38476 heiborlem3 38628 heibor 38636 lzenom 43680 fiphp3d 43725 irrapx1 43734 pellex 43741 nnfoctb 45947 zenom 45951 qenom 46256 ioonct 46432 caragenunicl 47417 caratheodory 47421 ovnsubaddlem2 47464 |
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