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| Mirrors > Home > MPE Home > Th. List > f1eq123d | Structured version Visualization version GIF version | ||
| Description: Equality deduction for one-to-one functions. (Contributed by Mario Carneiro, 27-Jan-2017.) |
| Ref | Expression |
|---|---|
| f1eq123d.1 | ⊢ (𝜑 → 𝐹 = 𝐺) |
| f1eq123d.2 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| f1eq123d.3 | ⊢ (𝜑 → 𝐶 = 𝐷) |
| Ref | Expression |
|---|---|
| f1eq123d | ⊢ (𝜑 → (𝐹:𝐴–1-1→𝐶 ↔ 𝐺:𝐵–1-1→𝐷)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1eq123d.1 | . . 3 ⊢ (𝜑 → 𝐹 = 𝐺) | |
| 2 | f1eq1 6776 | . . 3 ⊢ (𝐹 = 𝐺 → (𝐹:𝐴–1-1→𝐶 ↔ 𝐺:𝐴–1-1→𝐶)) | |
| 3 | 1, 2 | syl 18 | . 2 ⊢ (𝜑 → (𝐹:𝐴–1-1→𝐶 ↔ 𝐺:𝐴–1-1→𝐶)) |
| 4 | f1eq123d.2 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 5 | f1eq2 6777 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐺:𝐴–1-1→𝐶 ↔ 𝐺:𝐵–1-1→𝐶)) | |
| 6 | 4, 5 | syl 18 | . 2 ⊢ (𝜑 → (𝐺:𝐴–1-1→𝐶 ↔ 𝐺:𝐵–1-1→𝐶)) |
| 7 | f1eq123d.3 | . . 3 ⊢ (𝜑 → 𝐶 = 𝐷) | |
| 8 | f1eq3 6778 | . . 3 ⊢ (𝐶 = 𝐷 → (𝐺:𝐵–1-1→𝐶 ↔ 𝐺:𝐵–1-1→𝐷)) | |
| 9 | 7, 8 | syl 18 | . 2 ⊢ (𝜑 → (𝐺:𝐵–1-1→𝐶 ↔ 𝐺:𝐵–1-1→𝐷)) |
| 10 | 3, 6, 9 | 3bitrd 308 | 1 ⊢ (𝜑 → (𝐹:𝐴–1-1→𝐶 ↔ 𝐺:𝐵–1-1→𝐷)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 –1-1→wf1 6540 |
| 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 2148 ax-9 2156 ax-ext 2738 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2745 df-cleq 2758 df-clel 2841 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-ss 3925 df-nul 4290 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-br 5115 df-opab 5179 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 |
| This theorem is used by: f10d 6862 f1resfz0f1d 13840 s1f1 14668 fthf1 18001 cofth 18019 rngqiprngimf1 21477 istrkgld 28765 istrkg2ld 28766 isushgr 29448 isuspgr 29539 isusgr 29540 isuspgrop 29548 isusgrop 29549 ausgrusgrb 29552 ausgrusgri 29555 usgrstrrepe 29622 uspgr1e 29631 usgrres1 29702 usgrexi 29828 uspgr2wlkeq 30032 usgr2trlncl 30146 aciunf1 33045 pfxf1 33299 tocycfv 33460 tocycf 33468 tocyc01 33469 cycpmco2f1 33475 cycpmco2rn 33476 cycpmco2lem1 33477 cycpmco2lem2 33478 cycpmco2lem3 33479 cycpmco2lem4 33480 cycpmco2lem5 33481 cycpmco2lem6 33482 cycpmco2lem7 33483 cycpmco2 33484 cycpm3cl2 33487 cycpmconjv 33493 tocyccntz 33495 cyc3evpm 33501 cycpmgcl 33504 cycpmconjslem2 33506 cyc3conja 33508 dimkerim 34048 aks6d1c2 42938 f1cof1b 47855 fundcmpsurinjALT 48202 upgrimtrls 48712 stgrusgra 48765 gpgusgra 48863 cofidf2 49939 |
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