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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 6770 | . . 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 6771 | . . 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 6772 | . . 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 6534 |
| 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 2147 ax-9 2155 ax-ext 2734 |
| 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 2741 df-cleq 2754 df-clel 2837 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-br 5108 df-opab 5172 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 |
| This theorem is used by: f10d 6856 f1resfz0f1d 13852 s1f1 14680 fthf1 18014 cofth 18032 rngqiprngimf1 21509 istrkgld 28808 istrkg2ld 28809 isushgr 29526 isuspgr 29620 isusgr 29621 isuspgrop 29629 isusgrop 29630 ausgrusgrb 29633 ausgrusgri 29636 usgrstrrepe 29703 uspgr1e 29712 usgrres1 29783 usgrexi 29909 uspgr2wlkeq 30113 usgr2trlncl 30233 aciunf1 33144 pfxf1 33396 tocycfv 33557 tocycf 33565 tocyc01 33566 cycpmco2f1 33572 cycpmco2rn 33573 cycpmco2lem1 33574 cycpmco2lem2 33575 cycpmco2lem3 33576 cycpmco2lem4 33577 cycpmco2lem5 33578 cycpmco2lem6 33579 cycpmco2lem7 33580 cycpmco2 33581 cycpm3cl2 33584 cycpmconjv 33590 tocyccntz 33592 cyc3evpm 33598 cycpmgcl 33601 cycpmconjslem2 33603 cyc3conja 33605 dimkerim 34145 aks6d1c2 43004 f1cof1b 47973 fundcmpsurinjALT 48320 upgrimtrls 48830 stgrusgra 48883 gpgusgra 48981 cofidf2 50054 |
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