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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 6696 | 1 ⊢ (𝜑 → (𝐹:𝐴⟶𝐵 ↔ 𝐹:𝐶⟶𝐷)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 = wceq 1570 ⟶wf 6534 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-ss 3923 df-nul 4288 df-if 4489 df-sn 4591 df-pr 4593 df-op 4597 df-br 5111 df-opab 5175 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-fun 6540 df-fn 6541 df-f 6542 |
| This theorem is referenced by: nvof1o 7280 axdc4uz 14022 isacs 17708 isfunc 17922 funcres 17954 funcpropd 17960 estrcco 18187 funcestrcsetclem9 18205 fullestrcsetc 18208 fullsetcestrc 18223 1stfcl 18254 2ndfcl 18255 evlfcl 18279 curf1cl 18285 yonedalem3b 18336 intopsn 18713 mgmhmpropd 18757 mhmpropd 18851 isghm 19287 pwssplit1 21161 islindf 21943 evls1sca 22464 rrxds 25533 wlkp1 30010 acunirnmpt 32985 fnpreimac 32996 pwrssmgc 33301 cnmbfm 34634 elmrsubrn 35993 poimirlem3 38255 poimirlem28 38280 isrngod 38530 rngosn3 38556 isgrpda 38587 islfld 39817 tendofset 41513 tendoset 41514 sn-isghm 43388 mapfzcons 43430 diophrw 43473 refsum2cnlem1 45740 funcringcsetcALTV2lem9 49046 funcringcsetclem9ALTV 49069 termcfuncval 50293 aacllem 50584 |
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