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| Mirrors > Home > MPE Home > Th. List > csbfv2g | Structured version Visualization version GIF version | ||
| Description: Move class substitution in and out of a function value. (Contributed by NM, 10-Nov-2005.) |
| Ref | Expression |
|---|---|
| csbfv2g | ⊢ (𝐴 ∈ 𝐶 → ⦋𝐴 / 𝑥⦌(𝐹‘𝐵) = (𝐹‘⦋𝐴 / 𝑥⦌𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | csbfv12 6930 | . 2 ⊢ ⦋𝐴 / 𝑥⦌(𝐹‘𝐵) = (⦋𝐴 / 𝑥⦌𝐹‘⦋𝐴 / 𝑥⦌𝐵) | |
| 2 | csbconstg 3865 | . . 3 ⊢ (𝐴 ∈ 𝐶 → ⦋𝐴 / 𝑥⦌𝐹 = 𝐹) | |
| 3 | 2 | fveq1d 6887 | . 2 ⊢ (𝐴 ∈ 𝐶 → (⦋𝐴 / 𝑥⦌𝐹‘⦋𝐴 / 𝑥⦌𝐵) = (𝐹‘⦋𝐴 / 𝑥⦌𝐵)) |
| 4 | 1, 3 | eqtrid 2807 | 1 ⊢ (𝐴 ∈ 𝐶 → ⦋𝐴 / 𝑥⦌(𝐹‘𝐵) = (𝐹‘⦋𝐴 / 𝑥⦌𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 ⦋csb 3846 ‘cfv 6538 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-nul 5259 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-dif 4047 df-un 4151 df-nul 4279 df-if 4482 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5103 df-dm 5660 df-iota 6494 df-fv 6546 |
| This theorem is used by: csbfv 6932 ixpsnval 8928 swrdspsleq 14815 sumeq2ii 15860 fsumabs 15968 prodeq2ii 16080 fprodabs 16141 ixpsnbasval 21483 coe1fzgsumdlem 22621 evl1gsumdlem 22674 pm2mp 23143 cayhamlem4 23206 iuninc 33155 cdlemk39s 41997 evl1gprodd 43168 minregex 44535 |
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