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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 6687 | . . 3 ⊢ (𝐹 = 𝐺 → (𝐹:𝐴⟶𝐵 ↔ 𝐺:𝐴⟶𝐵)) | |
| 2 | cnveq 5850 | . . . 4 ⊢ (𝐹 = 𝐺 → ◡𝐹 = ◡𝐺) | |
| 3 | 2 | funeqd 6561 | . . 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 6543 | . 2 ⊢ (𝐹:𝐴–1-1→𝐵 ↔ (𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹)) | |
| 6 | df-f1 6543 | . 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 5649 Fun wfun 6532 ⟶wf 6534 –1-1→wf1 6535 |
| 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 3896 df-dif 4047 df-un 4151 df-nul 4279 df-if 4482 df-sn 4584 df-pr 4586 df-op 4590 df-br 5103 df-opab 5167 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 |
| This theorem is used by: f1oeq1 6812 f1eq123d 6816 fo00 6861 f1prex 7292 f1iun 7956 tposf12 8268 oacomf1olem 8572 f1dom4g 8992 f1dom3g 8994 f1domg 8998 dom3d 9021 domtr 9034 0domg 9123 domssex2 9156 marypha1lem 9425 fseqenlem1 10103 dfac12lem2 10223 dfac12lem3 10224 ackbij2 10320 fin23lem28 10418 fin23lem32 10422 fin23lem34 10424 fin23lem35 10425 fin23lem41 10430 iundom2g 10624 pwfseqlem5 10748 hashf1lem1 14600 hashf1lem2 14601 hashf1 14602 4sqlem11 17133 injsubmefmnd 19093 conjsubgen 19465 sylow1lem2 19813 sylow2blem1 19834 hauspwpwf1 24306 oldfib 28763 istrkg2ld 28922 axlowdim 29539 sizusglecusg 30044 specval 32500 aciunf1lem 33256 zrhchr 34606 qqhre 34652 vonf1oonf1 35893 hashnexinj 43179 eldioph2lem2 43772 meadjiunlem 47475 fcoresf1b 48140 fundcmpsurbijinjpreimafv 48489 fundcmpsurinjpreimafv 48490 fundcmpsurinjimaid 48493 f1sn2g 49961 f102g 49962 |
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