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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 2738 | . 2 ⊢ (𝜑 → 𝐹 = 𝐹) | |
| 2 | feq23d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐶) | |
| 3 | feq23d.2 | . 2 ⊢ (𝜑 → 𝐵 = 𝐷) | |
| 4 | 1, 2, 3 | feq123d 6649 | 1 ⊢ (𝜑 → (𝐹:𝐴⟶𝐵 ↔ 𝐹:𝐶⟶𝐷)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1542 ⟶wf 6486 |
| 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 2709 |
| 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 2716 df-cleq 2729 df-clel 2812 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-br 5087 df-opab 5149 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-fun 6492 df-fn 6493 df-f 6494 |
| This theorem is referenced by: nvof1o 7226 axdc4uz 13908 isacs 17575 isfunc 17789 funcres 17821 funcpropd 17827 estrcco 18054 funcestrcsetclem9 18072 fullestrcsetc 18075 fullsetcestrc 18090 1stfcl 18121 2ndfcl 18122 evlfcl 18146 curf1cl 18152 yonedalem3b 18203 intopsn 18580 mgmhmpropd 18624 mhmpropd 18718 isghm 19148 pwssplit1 21013 islindf 21769 evls1sca 22266 rrxds 25338 wlkp1 29737 acunirnmpt 32721 fnpreimac 32732 pwrssmgc 33065 cnmbfm 34413 elmrsubrn 35708 poimirlem3 37935 poimirlem28 37960 isrngod 38210 rngosn3 38236 isgrpda 38267 islfld 39499 tendofset 41195 tendoset 41196 sn-isghm 43105 mapfzcons 43147 diophrw 43190 refsum2cnlem1 45471 funcringcsetcALTV2lem9 48732 funcringcsetclem9ALTV 48755 termcfuncval 49965 aacllem 50234 |
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