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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 6651 | 1 ⊢ (𝜑 → (𝐹:𝐴⟶𝐵 ↔ 𝐹:𝐶⟶𝐷)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1542 ⟶wf 6488 |
| 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 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-fun 6494 df-fn 6495 df-f 6496 |
| This theorem is referenced by: nvof1o 7228 axdc4uz 13937 isacs 17608 isfunc 17822 funcres 17854 funcpropd 17860 estrcco 18087 funcestrcsetclem9 18105 fullestrcsetc 18108 fullsetcestrc 18123 1stfcl 18154 2ndfcl 18155 evlfcl 18179 curf1cl 18185 yonedalem3b 18236 intopsn 18613 mgmhmpropd 18657 mhmpropd 18751 isghm 19181 pwssplit1 21046 islindf 21802 evls1sca 22298 rrxds 25370 wlkp1 29763 acunirnmpt 32747 fnpreimac 32758 pwrssmgc 33075 cnmbfm 34423 elmrsubrn 35718 poimirlem3 37958 poimirlem28 37983 isrngod 38233 rngosn3 38259 isgrpda 38290 islfld 39522 tendofset 41218 tendoset 41219 sn-isghm 43120 mapfzcons 43162 diophrw 43205 refsum2cnlem1 45486 funcringcsetcALTV2lem9 48786 funcringcsetclem9ALTV 48809 termcfuncval 50019 aacllem 50288 |
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