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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 2767 | . 2 ⊢ (𝜑 → 𝐹 = 𝐹) | |
| 2 | feq23d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐶) | |
| 3 | feq23d.2 | . 2 ⊢ (𝜑 → 𝐵 = 𝐷) | |
| 4 | 1, 2, 3 | feq123d 6701 | 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 6539 |
| 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 2148 ax-9 2156 ax-ext 2738 |
| 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 2745 df-cleq 2758 df-clel 2841 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-ss 3925 df-nul 4290 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-br 5115 df-opab 5179 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-fun 6545 df-fn 6546 df-f 6547 |
| This theorem is used by: nvof1o 7289 axdc4uz 14040 isacs 17732 isfunc 17946 funcres 17978 funcpropd 17984 estrcco 18211 funcestrcsetclem9 18229 fullestrcsetc 18232 fullsetcestrc 18247 1stfcl 18278 2ndfcl 18279 evlfcl 18303 curf1cl 18309 yonedalem3b 18360 intopsn 18737 mgmhmpropd 18785 mhmpropd 18881 isghm 19317 pwssplit1 21217 islindf 21999 evls1sca 22520 rrxds 25589 wlkp1 30066 acunirnmpt 33041 fnpreimac 33052 pwrssmgc 33351 cnmbfm 34685 elmrsubrn 36033 poimirlem3 38315 poimirlem28 38340 isrngod 38590 rngosn3 38616 isgrpda 38647 islfld 39877 tendofset 41573 tendoset 41574 sn-isghm 43446 mapfzcons 43488 diophrw 43531 refsum2cnlem1 45798 funcringcsetcALTV2lem9 49104 funcringcsetclem9ALTV 49127 termcfuncval 50351 aacllem 50662 |
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