| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 2763 | . 2 ⊢ (𝜑 → 𝐹 = 𝐹) | |
| 2 | feq23d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐶) | |
| 3 | feq23d.2 | . 2 ⊢ (𝜑 → 𝐵 = 𝐷) | |
| 4 | 1, 2, 3 | feq123d 6695 | 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 6533 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2734 |
| 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 2100 df-clab 2741 df-cleq 2754 df-clel 2837 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-br 5108 df-opab 5172 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-fun 6539 df-fn 6540 df-f 6541 |
| This theorem is used by: nvof1o 7285 axdc4uz 14052 isacs 17745 isfunc 17959 funcres 17991 funcpropd 17997 estrcco 18224 funcestrcsetclem9 18242 fullestrcsetc 18245 fullsetcestrc 18260 1stfcl 18291 2ndfcl 18292 evlfcl 18316 curf1cl 18322 yonedalem3b 18373 intopsn 18752 mgmhmpropd 18806 mhmpropd 18906 isghm 19349 pwssplit1 21249 islindf 22031 evls1sca 22554 rrxds 25627 wlkp1 30147 acunirnmpt 33140 fnpreimac 33151 pwrssmgc 33448 cnmbfm 34782 elmrsubrn 36107 poimirlem3 38380 poimirlem28 38405 isrngod 38656 rngosn3 38682 isgrpda 38713 islfld 39943 tendofset 41639 tendoset 41640 sn-isghm 43527 mapfzcons 43569 diophrw 43612 refsum2cnlem1 45879 funcringcsetcALTV2lem9 49221 funcringcsetclem9ALTV 49244 termcfuncval 50466 aacllem 50780 |
| Copyright terms: Public domain | W3C validator |