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| Mirrors > Home > MPE Home > Th. List > f1eq1 | Structured version Visualization version GIF version | ||
| Description: Equality theorem for one-to-one functions. (Contributed by NM, 10-Feb-1997.) |
| Ref | Expression |
|---|---|
| f1eq1 | ⊢ (𝐹 = 𝐺 → (𝐹:𝐴–1-1→𝐵 ↔ 𝐺:𝐴–1-1→𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | feq1 6692 | . . 3 ⊢ (𝐹 = 𝐺 → (𝐹:𝐴⟶𝐵 ↔ 𝐺:𝐴⟶𝐵)) | |
| 2 | cnveq 5852 | . . . 4 ⊢ (𝐹 = 𝐺 → ◡𝐹 = ◡𝐺) | |
| 3 | 2 | funeqd 6566 | . . 3 ⊢ (𝐹 = 𝐺 → (Fun ◡𝐹 ↔ Fun ◡𝐺)) |
| 4 | 1, 3 | anbi12d 644 | . 2 ⊢ (𝐹 = 𝐺 → ((𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹) ↔ (𝐺:𝐴⟶𝐵 ∧ Fun ◡𝐺))) |
| 5 | df-f1 6548 | . 2 ⊢ (𝐹:𝐴–1-1→𝐵 ↔ (𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹)) | |
| 6 | df-f1 6548 | . 2 ⊢ (𝐺:𝐴–1-1→𝐵 ↔ (𝐺:𝐴⟶𝐵 ∧ Fun ◡𝐺)) | |
| 7 | 4, 5, 6 | 3bitr4g 317 | 1 ⊢ (𝐹 = 𝐺 → (𝐹:𝐴–1-1→𝐵 ↔ 𝐺:𝐴–1-1→𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1569 ◡ccnv 5650 Fun wfun 6537 ⟶wf 6539 –1-1→wf1 6540 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-rab 3413 df-v 3452 df-ss 3897 df-dif 4046 df-un 4150 df-nul 4278 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-opab 5167 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 |
| This theorem is used by: f1oeq1 6817 f1eq123d 6821 fo00 6866 f1prex 7296 f1iun 7960 tposf12 8275 oacomf1olem 8579 f1dom4g 8999 f1dom3g 9001 f1domg 9005 dom3d 9028 domtr 9041 0domg 9130 domssex2 9163 marypha1lem 9432 fseqenlem1 10110 dfac12lem2 10230 dfac12lem3 10231 ackbij2 10327 fin23lem28 10425 fin23lem32 10429 fin23lem34 10431 fin23lem35 10432 fin23lem41 10437 iundom2g 10631 pwfseqlem5 10755 hashf1lem1 14607 hashf1lem2 14608 hashf1 14609 4sqlem11 17142 injsubmefmnd 19102 conjsubgen 19474 sylow1lem2 19822 sylow2blem1 19843 hauspwpwf1 24315 oldfib 28772 istrkg2ld 28931 axlowdim 29548 sizusglecusg 30053 specval 32509 aciunf1lem 33307 zrhchr 34656 qqhre 34702 vonf1oonf1 35966 onf1oracwevd 35975 onprcf1of1orad 35976 onprcf1of1orbd 35977 onprcf1of1ord 35978 hashnexinj 43287 eldioph2lem2 43881 meadjiunlem 47583 fcoresf1b 48248 fundcmpsurbijinjpreimafv 48597 fundcmpsurinjpreimafv 48598 fundcmpsurinjimaid 48601 f1sn2g 50070 f102g 50071 |
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