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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 2737 | . 2 ⊢ (𝜑 → 𝐹 = 𝐹) | |
| 2 | feq23d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐶) | |
| 3 | feq23d.2 | . 2 ⊢ (𝜑 → 𝐵 = 𝐷) | |
| 4 | 1, 2, 3 | feq123d 6657 | 1 ⊢ (𝜑 → (𝐹:𝐴⟶𝐵 ↔ 𝐹:𝐶⟶𝐷)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1542 ⟶wf 6494 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2708 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2715 df-cleq 2728 df-clel 2811 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-br 5086 df-opab 5148 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-fun 6500 df-fn 6501 df-f 6502 |
| This theorem is referenced by: nvof1o 7235 axdc4uz 13946 isacs 17617 isfunc 17831 funcres 17863 funcpropd 17869 estrcco 18096 funcestrcsetclem9 18114 fullestrcsetc 18117 fullsetcestrc 18132 1stfcl 18163 2ndfcl 18164 evlfcl 18188 curf1cl 18194 yonedalem3b 18245 intopsn 18622 mgmhmpropd 18666 mhmpropd 18760 isghm 19190 pwssplit1 21054 islindf 21792 evls1sca 22288 rrxds 25360 wlkp1 29748 acunirnmpt 32732 fnpreimac 32743 pwrssmgc 33060 cnmbfm 34407 elmrsubrn 35702 poimirlem3 37944 poimirlem28 37969 isrngod 38219 rngosn3 38245 isgrpda 38276 islfld 39508 tendofset 41204 tendoset 41205 sn-isghm 43106 mapfzcons 43148 diophrw 43191 refsum2cnlem1 45468 funcringcsetcALTV2lem9 48774 funcringcsetclem9ALTV 48797 termcfuncval 50007 aacllem 50276 |
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