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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 3872 | . . 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 2810 | 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 2143 ⦋csb 3853 ‘cfv 6536 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-nul 5269 ax-pr 5404 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-dm 5671 df-iota 6492 df-fv 6544 |
| This theorem is used by: csbfv 6928 ixpsnval 8894 swrdspsleq 14708 sumeq2ii 15749 fsumabs 15858 prodeq2ii 15970 fprodabs 16033 ixpsnbasval 21338 coe1fzgsumdlem 22472 evl1gsumdlem 22525 pm2mp 22991 cayhamlem4 23054 iuninc 32914 cdlemk39s 41741 evl1gprodd 42912 minregex 44288 |
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