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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 6926 | . 2 ⊢ ⦋𝐴 / 𝑥⦌(𝐹‘𝐵) = (⦋𝐴 / 𝑥⦌𝐹‘⦋𝐴 / 𝑥⦌𝐵) | |
| 2 | csbconstg 3866 | . . 3 ⊢ (𝐴 ∈ 𝐶 → ⦋𝐴 / 𝑥⦌𝐹 = 𝐹) | |
| 3 | 2 | fveq1d 6883 | . 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 1570 ∈ wcel 2145 ⦋csb 3847 ‘cfv 6535 |
| 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-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-nul 5263 ax-pr 5398 |
| 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-nf 1817 df-sb 2100 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 3740 df-csb 3848 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-dm 5665 df-iota 6491 df-fv 6543 |
| This theorem is used by: csbfv 6928 ixpsnval 8914 swrdspsleq 14760 sumeq2ii 15805 fsumabs 15913 prodeq2ii 16025 fprodabs 16086 ixpsnbasval 21422 coe1fzgsumdlem 22560 evl1gsumdlem 22613 pm2mp 23082 cayhamlem4 23145 iuninc 33066 cdlemk39s 41877 evl1gprodd 43048 minregex 44439 |
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