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| Mirrors > Home > MPE Home > Th. List > feq23d | Structured version Visualization version GIF version | ||
| Description: Equality deduction for functions. (Contributed by NM, 8-Jun-2013.) |
| Ref | Expression |
|---|---|
| feq23d.1 | ⊢ (𝜑 → 𝐴 = 𝐶) |
| feq23d.2 | ⊢ (𝜑 → 𝐵 = 𝐷) |
| Ref | Expression |
|---|---|
| feq23d | ⊢ (𝜑 → (𝐹:𝐴⟶𝐵 ↔ 𝐹:𝐶⟶𝐷)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqidd 2762 | . 2 ⊢ (𝜑 → 𝐹 = 𝐹) | |
| 2 | feq23d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐶) | |
| 3 | feq23d.2 | . 2 ⊢ (𝜑 → 𝐵 = 𝐷) | |
| 4 | 1, 2, 3 | feq123d 6690 | 1 ⊢ (𝜑 → (𝐹:𝐴⟶𝐵 ↔ 𝐹:𝐶⟶𝐷)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ⟶wf 6527 |
| 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 2733 |
| 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 2740 df-cleq 2753 df-clel 2836 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5104 df-opab 5168 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-fun 6533 df-fn 6534 df-f 6535 |
| This theorem is used by: nvof1o 7280 axdc4uz 14107 isacs 17805 isfunc 18019 funcres 18051 funcpropd 18057 estrcco 18284 funcestrcsetclem9 18302 fullestrcsetc 18305 fullsetcestrc 18320 1stfcl 18351 2ndfcl 18352 evlfcl 18376 curf1cl 18382 yonedalem3b 18433 intopsn 18812 mgmhmpropd 18867 mhmpropd 18967 isghm 19410 pwssplit1 21314 islindf 22098 evls1sca 22621 rrxds 25694 wlkp1 30242 acunirnmpt 33235 fnpreimac 33246 pwrssmgc 33543 cnmbfm 34878 elmrsubrn 36254 poimirlem3 38509 poimirlem28 38534 isrngod 38800 rngosn3 38826 isgrpda 38857 islfld 40087 tendofset 41783 tendoset 41784 sn-isghm 43638 mapfzcons 43680 diophrw 43723 refsum2cnlem1 45997 funcringcsetcALTV2lem9 49339 funcringcsetclem9ALTV 49362 termcfuncval 50584 aacllem 50883 |
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