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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 2764 | . 2 ⊢ (𝜑 → 𝐹 = 𝐹) | |
| 2 | feq23d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐶) | |
| 3 | feq23d.2 | . 2 ⊢ (𝜑 → 𝐵 = 𝐷) | |
| 4 | 1, 2, 3 | feq123d 6723 | 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 6557 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 |
| 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 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-br 5107 df-opab 5172 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-fun 6563 df-fn 6564 df-f 6565 |
| This theorem is used by: nvof1o 7314 axdc4uz 14157 isacs 17857 isfunc 18071 funcres 18103 funcpropd 18109 estrcco 18336 funcestrcsetclem9 18354 fullestrcsetc 18357 fullsetcestrc 18372 1stfcl 18403 2ndfcl 18404 evlfcl 18428 curf1cl 18434 yonedalem3b 18485 intopsn 18864 mgmhmpropd 18919 mhmpropd 19019 isghm 19462 pwssplit1 21367 islindf 22151 evls1sca 22674 rrxds 25747 wlkp1 30293 acunirnmpt 33328 fnpreimac 33339 pwrssmgc 33637 cnmbfm 34978 elmrsubrn 36465 poimirlem3 38746 poimirlem28 38771 isrngod 39035 rngosn3 39061 isgrpda 39092 islfld 40322 tendofset 42018 tendoset 42019 sn-isghm 43888 mapfzcons 43931 diophrw 43974 refsum2cnlem1 46270 funcringcsetcALTV2lem9 49610 funcringcsetclem9ALTV 49633 termcfuncval 50882 aacllem 51251 |
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