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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 2761 | . 2 ⊢ (𝜑 → 𝐹 = 𝐹) | |
| 2 | feq23d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐶) | |
| 3 | feq23d.2 | . 2 ⊢ (𝜑 → 𝐵 = 𝐷) | |
| 4 | 1, 2, 3 | feq123d 6698 | 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 1569 ⟶wf 6534 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-opab 5167 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-fun 6540 df-fn 6541 df-f 6542 |
| This theorem is used by: nvof1o 7288 axdc4uz 14130 isacs 17830 isfunc 18044 funcres 18076 funcpropd 18082 estrcco 18309 funcestrcsetclem9 18327 fullestrcsetc 18330 fullsetcestrc 18345 1stfcl 18376 2ndfcl 18377 evlfcl 18401 curf1cl 18407 yonedalem3b 18458 intopsn 18837 mgmhmpropd 18892 mhmpropd 18992 isghm 19435 pwssplit1 21339 islindf 22123 evls1sca 22646 rrxds 25719 wlkp1 30265 acunirnmpt 33300 fnpreimac 33311 pwrssmgc 33607 cnmbfm 34941 elmrsubrn 36371 poimirlem3 38634 poimirlem28 38659 isrngod 38925 rngosn3 38951 isgrpda 38982 islfld 40212 tendofset 41908 tendoset 41909 sn-isghm 43777 mapfzcons 43820 diophrw 43863 refsum2cnlem1 46147 funcringcsetcALTV2lem9 49488 funcringcsetclem9ALTV 49511 termcfuncval 50760 aacllem 51107 |
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