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| Mirrors > Home > MPE Home > Th. List > hasheni | Structured version Visualization version GIF version | ||
| Description: Equinumerous sets have the same number of elements (even if they are not finite). (Contributed by Mario Carneiro, 15-Apr-2015.) |
| Ref | Expression |
|---|---|
| hasheni | ⊢ (𝐴 ≈ 𝐵 → (♯‘𝐴) = (♯‘𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simpl 486 | . . 3 ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐵 ∈ Fin) → 𝐴 ≈ 𝐵) | |
| 2 | enfii 9148 | . . . . 5 ⊢ ((𝐵 ∈ Fin ∧ 𝐴 ≈ 𝐵) → 𝐴 ∈ Fin) | |
| 3 | 2 | ancoms 462 | . . . 4 ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐵 ∈ Fin) → 𝐴 ∈ Fin) |
| 4 | hashen 14354 | . . . 4 ⊢ ((𝐴 ∈ Fin ∧ 𝐵 ∈ Fin) → ((♯‘𝐴) = (♯‘𝐵) ↔ 𝐴 ≈ 𝐵)) | |
| 5 | 3, 4 | sylancom 597 | . . 3 ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐵 ∈ Fin) → ((♯‘𝐴) = (♯‘𝐵) ↔ 𝐴 ≈ 𝐵)) |
| 6 | 1, 5 | mpbird 259 | . 2 ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐵 ∈ Fin) → (♯‘𝐴) = (♯‘𝐵)) |
| 7 | relen 8926 | . . . . 5 ⊢ Rel ≈ | |
| 8 | 7 | brrelex1i 5699 | . . . 4 ⊢ (𝐴 ≈ 𝐵 → 𝐴 ∈ V) |
| 9 | enfi 9149 | . . . . . 6 ⊢ (𝐴 ≈ 𝐵 → (𝐴 ∈ Fin ↔ 𝐵 ∈ Fin)) | |
| 10 | 9 | notbid 320 | . . . . 5 ⊢ (𝐴 ≈ 𝐵 → (¬ 𝐴 ∈ Fin ↔ ¬ 𝐵 ∈ Fin)) |
| 11 | 10 | biimpar 481 | . . . 4 ⊢ ((𝐴 ≈ 𝐵 ∧ ¬ 𝐵 ∈ Fin) → ¬ 𝐴 ∈ Fin) |
| 12 | hashinf 14342 | . . . 4 ⊢ ((𝐴 ∈ V ∧ ¬ 𝐴 ∈ Fin) → (♯‘𝐴) = +∞) | |
| 13 | 8, 11, 12 | syl2an2r 695 | . . 3 ⊢ ((𝐴 ≈ 𝐵 ∧ ¬ 𝐵 ∈ Fin) → (♯‘𝐴) = +∞) |
| 14 | 7 | brrelex2i 5700 | . . . 4 ⊢ (𝐴 ≈ 𝐵 → 𝐵 ∈ V) |
| 15 | hashinf 14342 | . . . 4 ⊢ ((𝐵 ∈ V ∧ ¬ 𝐵 ∈ Fin) → (♯‘𝐵) = +∞) | |
| 16 | 14, 15 | sylan 589 | . . 3 ⊢ ((𝐴 ≈ 𝐵 ∧ ¬ 𝐵 ∈ Fin) → (♯‘𝐵) = +∞) |
| 17 | 13, 16 | eqtr4d 2799 | . 2 ⊢ ((𝐴 ≈ 𝐵 ∧ ¬ 𝐵 ∈ Fin) → (♯‘𝐴) = (♯‘𝐵)) |
| 18 | 6, 17 | pm2.61dan 822 | 1 ⊢ (𝐴 ≈ 𝐵 → (♯‘𝐴) = (♯‘𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 ∧ wa 399 = wceq 1559 ∈ wcel 2141 Vcvv 3453 class class class wbr 5097 ‘cfv 6516 ≈ cen 8918 Fincfn 8921 +∞cpnf 11207 ♯chash 14337 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7713 ax-cnex 11123 ax-resscn 11124 ax-1cn 11125 ax-icn 11126 ax-addcl 11127 ax-addrcl 11128 ax-mulcl 11129 ax-mulrcl 11130 ax-mulcom 11131 ax-addass 11132 ax-mulass 11133 ax-distr 11134 ax-i2m1 11135 ax-1ne0 11136 ax-1rid 11137 ax-rnegex 11138 ax-rrecex 11139 ax-cnre 11140 ax-pre-lttri 11141 ax-pre-lttrn 11142 ax-pre-ltadd 11143 ax-pre-mulgt0 11144 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-int 4903 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5179 df-tr 5205 df-id 5538 df-eprel 5543 df-po 5551 df-so 5552 df-fr 5596 df-we 5598 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-pred 6283 df-ord 6344 df-on 6345 df-lim 6346 df-suc 6347 df-iota 6472 df-fun 6518 df-fn 6519 df-f 6520 df-f1 6521 df-fo 6522 df-f1o 6523 df-fv 6524 df-riota 7348 df-ov 7394 df-oprab 7395 df-mpo 7396 df-om 7842 df-2nd 7966 df-frecs 8256 df-wrecs 8287 df-recs 8336 df-rdg 8375 df-1o 8431 df-er 8672 df-en 8922 df-dom 8923 df-sdom 8924 df-fin 8925 df-card 9891 df-pnf 11212 df-mnf 11213 df-xr 11214 df-ltxr 11215 df-le 11216 df-sub 11410 df-neg 11411 df-nn 12205 df-n0 12476 df-z 12563 df-uz 12834 df-hash 14338 |
| This theorem is referenced by: hashen1 14377 hashfn 14382 hashfz 14434 hashf1lem2 14463 ishashinf 14470 hashgcdeq 16816 ramub2 17041 ram0 17049 odhash 19605 odhash2 19606 odngen 19608 znhash 21598 znunithash 21604 cyggic 21612 birthdaylem2 27005 lgsquadlem1 27432 lgsquadlem2 27433 lgsquadlem3 27434 wlknwwlksneqs 30047 numclwwlk1 30520 hashimaf1 32974 lbslelsp 33856 dimval 33859 dimvalfi 33860 dimkerim 33885 fedgmul 33889 eulerpart 34640 ballotlemro 34781 ballotlemfrc 34785 ballotlem8 34795 sticksstones5 42728 sticksstones20 42744 rp-isfinite5 44054 grtrimap 48531 |
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