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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 6931 | . 2 ⊢ ⦋𝐴 / 𝑥⦌(𝐹‘𝐵) = (⦋𝐴 / 𝑥⦌𝐹‘⦋𝐴 / 𝑥⦌𝐵) | |
| 2 | csbconstg 3873 | . . 3 ⊢ (𝐴 ∈ 𝐶 → ⦋𝐴 / 𝑥⦌𝐹 = 𝐹) | |
| 3 | 2 | fveq1d 6888 | . 2 ⊢ (𝐴 ∈ 𝐶 → (⦋𝐴 / 𝑥⦌𝐹‘⦋𝐴 / 𝑥⦌𝐵) = (𝐹‘⦋𝐴 / 𝑥⦌𝐵)) |
| 4 | 1, 3 | eqtrid 2812 | 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 2146 ⦋csb 3854 ‘cfv 6541 |
| 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-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-nul 5271 ax-pr 5406 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-dm 5673 df-iota 6497 df-fv 6549 |
| This theorem is used by: csbfv 6933 ixpsnval 8905 swrdspsleq 14730 sumeq2ii 15773 fsumabs 15881 prodeq2ii 15993 fprodabs 16056 ixpsnbasval 21384 coe1fzgsumdlem 22518 evl1gsumdlem 22571 pm2mp 23037 cayhamlem4 23100 iuninc 32981 cdlemk39s 41776 evl1gprodd 42947 minregex 44338 |
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