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| Mirrors > Home > MPE Home > Th. List > csbfv | Structured version Visualization version GIF version | ||
| Description: Substitution for a function value. (Contributed by NM, 1-Jan-2006.) (Revised by NM, 20-Aug-2018.) |
| Ref | Expression |
|---|---|
| csbfv | ⊢ ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | csbfv2g 6909 | . . 3 ⊢ (𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘⦋𝐴 / 𝑥⦌𝑥)) | |
| 2 | csbvarg 4387 | . . . 4 ⊢ (𝐴 ∈ V → ⦋𝐴 / 𝑥⦌𝑥 = 𝐴) | |
| 3 | 2 | fveq2d 6867 | . . 3 ⊢ (𝐴 ∈ V → (𝐹‘⦋𝐴 / 𝑥⦌𝑥) = (𝐹‘𝐴)) |
| 4 | 1, 3 | eqtrd 2796 | . 2 ⊢ (𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴)) |
| 5 | csbprc 4362 | . . 3 ⊢ (¬ 𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = ∅) | |
| 6 | fvprc 6855 | . . 3 ⊢ (¬ 𝐴 ∈ V → (𝐹‘𝐴) = ∅) | |
| 7 | 5, 6 | eqtr4d 2799 | . 2 ⊢ (¬ 𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴)) |
| 8 | 4, 7 | pm2.61i 183 | 1 ⊢ ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 = wceq 1559 ∈ wcel 2141 Vcvv 3453 ⦋csb 3852 ∅c0 4285 ‘cfv 6517 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-nul 5255 ax-pr 5389 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-ss 3921 df-nul 4286 df-if 4480 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-br 5100 df-dm 5655 df-iota 6473 df-fv 6525 |
| This theorem is referenced by: mptcoe1fsupp 22257 mptcoe1matfsupp 22842 mp2pm2mplem4 22849 chfacfscmulfsupp 22899 chfacfpmmulfsupp 22903 cpmidpmatlem3 22912 cayhamlem4 22928 cayleyhamilton1 22932 logbmpt 26830 nbgrcl 29482 nbgrnvtx0 29486 iuninc 32709 disjxpin 32737 finixpnum 38068 cdlemkid3N 41521 cdlemkid4 41522 cdlemk39s 41527 mccllem 46137 clnbgrcl 48407 clnbgrnvtx0 48413 |
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