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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 2741 | . 2 ⊢ (𝜑 → 𝐹 = 𝐹) | |
| 2 | feq23d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐶) | |
| 3 | feq23d.2 | . 2 ⊢ (𝜑 → 𝐵 = 𝐷) | |
| 4 | 1, 2, 3 | feq123d 6651 | 1 ⊢ (𝜑 → (𝐹:𝐴⟶𝐵 ↔ 𝐹:𝐶⟶𝐷)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 207 = wceq 1547 ⟶wf 6488 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2712 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2719 df-cleq 2732 df-clel 2815 df-rab 3393 df-v 3434 df-dif 3893 df-un 3895 df-ss 3907 df-nul 4269 df-if 4462 df-sn 4563 df-pr 4565 df-op 4569 df-br 5080 df-opab 5142 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-fun 6494 df-fn 6495 df-f 6496 |
| This theorem is referenced by: nvof1o 7231 axdc4uz 13944 isacs 17615 isfunc 17829 funcres 17861 funcpropd 17867 estrcco 18094 funcestrcsetclem9 18112 fullestrcsetc 18115 fullsetcestrc 18130 1stfcl 18161 2ndfcl 18162 evlfcl 18186 curf1cl 18192 yonedalem3b 18243 intopsn 18620 mgmhmpropd 18664 mhmpropd 18758 isghm 19188 pwssplit1 21056 islindf 21794 evls1sca 22316 rrxds 25385 wlkp1 29773 acunirnmpt 32758 fnpreimac 32769 pwrssmgc 33086 cnmbfm 34454 elmrsubrn 35755 poimirlem3 37997 poimirlem28 38022 isrngod 38272 rngosn3 38298 isgrpda 38329 islfld 39561 tendofset 41257 tendoset 41258 sn-isghm 43130 mapfzcons 43172 diophrw 43215 refsum2cnlem1 45492 funcringcsetcALTV2lem9 48796 funcringcsetclem9ALTV 48819 termcfuncval 50029 aacllem 50298 |
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