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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 6659 | 1 ⊢ (𝜑 → (𝐹:𝐴⟶𝐵 ↔ 𝐹:𝐶⟶𝐷)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1542 ⟶wf 6496 |
| 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 3402 df-v 3444 df-dif 3906 df-un 3908 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-br 5101 df-opab 5163 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-fun 6502 df-fn 6503 df-f 6504 |
| This theorem is referenced by: nvof1o 7236 axdc4uz 13919 isacs 17586 isfunc 17800 funcres 17832 funcpropd 17838 estrcco 18065 funcestrcsetclem9 18083 fullestrcsetc 18086 fullsetcestrc 18101 1stfcl 18132 2ndfcl 18133 evlfcl 18157 curf1cl 18163 yonedalem3b 18214 intopsn 18591 mgmhmpropd 18635 mhmpropd 18729 isghm 19156 pwssplit1 21023 islindf 21779 evls1sca 22279 rrxds 25361 wlkp1 29765 acunirnmpt 32748 fnpreimac 32759 pwrssmgc 33092 cnmbfm 34440 elmrsubrn 35733 poimirlem3 37871 poimirlem28 37896 isrngod 38146 rngosn3 38172 isgrpda 38203 islfld 39435 tendofset 41131 tendoset 41132 sn-isghm 43028 mapfzcons 43070 diophrw 43113 refsum2cnlem1 45394 funcringcsetcALTV2lem9 48655 funcringcsetclem9ALTV 48678 termcfuncval 49888 aacllem 50157 |
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