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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 2766 | . 2 ⊢ (𝜑 → 𝐹 = 𝐹) | |
| 2 | feq23d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐶) | |
| 3 | feq23d.2 | . 2 ⊢ (𝜑 → 𝐵 = 𝐷) | |
| 4 | 1, 2, 3 | feq123d 6684 | 1 ⊢ (𝜑 → (𝐹:𝐴⟶𝐵 ↔ 𝐹:𝐶⟶𝐷)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 = wceq 1563 ⟶wf 6521 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-ext 2737 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-sb 2094 df-clab 2744 df-cleq 2757 df-clel 2840 df-rab 3418 df-v 3459 df-dif 3910 df-un 3912 df-ss 3924 df-nul 4289 df-if 4484 df-sn 4586 df-pr 4588 df-op 4592 df-br 5105 df-opab 5167 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-fun 6527 df-fn 6528 df-f 6529 |
| This theorem is referenced by: nvof1o 7268 axdc4uz 14008 isacs 17695 isfunc 17909 funcres 17941 funcpropd 17947 estrcco 18174 funcestrcsetclem9 18192 fullestrcsetc 18195 fullsetcestrc 18210 1stfcl 18241 2ndfcl 18242 evlfcl 18266 curf1cl 18272 yonedalem3b 18323 intopsn 18700 mgmhmpropd 18744 mhmpropd 18838 isghm 19274 pwssplit1 21146 islindf 21919 evls1sca 22440 rrxds 25509 wlkp1 29934 acunirnmpt 32912 fnpreimac 32923 pwrssmgc 33228 cnmbfm 34565 elmrsubrn 35878 poimirlem3 38129 poimirlem28 38154 isrngod 38404 rngosn3 38430 isgrpda 38461 islfld 39693 tendofset 41389 tendoset 41390 sn-isghm 43262 mapfzcons 43304 diophrw 43347 refsum2cnlem1 45616 funcringcsetcALTV2lem9 48919 funcringcsetclem9ALTV 48942 termcfuncval 50162 aacllem 50431 |
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