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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 6676 | 1 ⊢ (𝜑 → (𝐹:𝐴⟶𝐵 ↔ 𝐹:𝐶⟶𝐷)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 = wceq 1559 ⟶wf 6513 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-ext 2733 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-sb 2090 df-clab 2740 df-cleq 2753 df-clel 2836 df-rab 3414 df-v 3455 df-dif 3907 df-un 3909 df-ss 3921 df-nul 4286 df-if 4480 df-sn 4582 df-pr 4584 df-op 4588 df-br 5100 df-opab 5162 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-fun 6519 df-fn 6520 df-f 6521 |
| This theorem is referenced by: nvof1o 7260 axdc4uz 13994 isacs 17666 isfunc 17880 funcres 17912 funcpropd 17918 estrcco 18145 funcestrcsetclem9 18163 fullestrcsetc 18166 fullsetcestrc 18181 1stfcl 18212 2ndfcl 18213 evlfcl 18237 curf1cl 18243 yonedalem3b 18294 intopsn 18671 mgmhmpropd 18715 mhmpropd 18809 isghm 19239 pwssplit1 21106 islindf 21844 evls1sca 22366 rrxds 25435 wlkp1 29826 acunirnmpt 32811 fnpreimac 32822 pwrssmgc 33139 cnmbfm 34521 elmrsubrn 35834 poimirlem3 38086 poimirlem28 38111 isrngod 38361 rngosn3 38387 isgrpda 38418 islfld 39650 tendofset 41346 tendoset 41347 sn-isghm 43219 mapfzcons 43261 diophrw 43304 refsum2cnlem1 45581 funcringcsetcALTV2lem9 48884 funcringcsetclem9ALTV 48907 termcfuncval 50117 aacllem 50386 |
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