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| Mirrors > Home > ILE Home > Th. List > f1oeng | GIF version | ||
| Description: The domain and range of a one-to-one, onto function are equinumerous. (Contributed by NM, 19-Jun-1998.) |
| Ref | Expression |
|---|---|
| f1oeng | ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐹:𝐴–1-1-onto→𝐵) → 𝐴 ≈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1ofo 5644 | . . . 4 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹:𝐴–onto→𝐵) | |
| 2 | focdmex 6338 | . . . 4 ⊢ (𝐴 ∈ 𝐶 → (𝐹:𝐴–onto→𝐵 → 𝐵 ∈ V)) | |
| 3 | 1, 2 | syl5 32 | . . 3 ⊢ (𝐴 ∈ 𝐶 → (𝐹:𝐴–1-1-onto→𝐵 → 𝐵 ∈ V)) |
| 4 | 3 | imp 124 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐹:𝐴–1-1-onto→𝐵) → 𝐵 ∈ V) |
| 5 | f1oen2g 7035 | . . 3 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ V ∧ 𝐹:𝐴–1-1-onto→𝐵) → 𝐴 ≈ 𝐵) | |
| 6 | 5 | 3com23 1240 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐹:𝐴–1-1-onto→𝐵 ∧ 𝐵 ∈ V) → 𝐴 ≈ 𝐵) |
| 7 | 4, 6 | mpd3an3 1379 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐹:𝐴–1-1-onto→𝐵) → 𝐴 ≈ 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∈ wcel 2209 Vcvv 2821 class class class wbr 4128 –onto→wfo 5373 –1-1-onto→wf1o 5374 ≈ cen 7014 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4244 ax-sep 4247 ax-pow 4309 ax-pr 4344 ax-un 4576 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-iun 4012 df-br 4129 df-opab 4191 df-mpt 4192 df-id 4436 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-res 4784 df-ima 4785 df-iota 5335 df-fun 5377 df-fn 5378 df-f 5379 df-f1 5380 df-fo 5381 df-f1o 5382 df-fv 5383 df-en 7017 |
| This theorem is referenced by: f1oen 7039 f1imaeng 7073 xpen 7139 fidifsnen 7166 dif1en 7177 f1ofi 7251 f1dmvrnfibi 7252 2omapen 7313 omp1eom 7429 endjusym 7430 eninl 7431 eninr 7432 summodclem2 12132 zsumdc 12134 prodmodclem2 12327 zproddc 12329 eulerthlemh 12992 4sqlem11 13163 ssnnctlemct 13320 conjsubgen 14064 gsumf1ofi 14143 znfi 14973 znhash 14974 usgrsizedgen 16437 eupthfi 16675 pw1mapen 17009 pwf1oexmid 17012 |
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