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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 6888 | . . 3 ⊢ (𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘⦋𝐴 / 𝑥⦌𝑥)) | |
| 2 | csbvarg 4388 | . . . 4 ⊢ (𝐴 ∈ V → ⦋𝐴 / 𝑥⦌𝑥 = 𝐴) | |
| 3 | 2 | fveq2d 6846 | . . 3 ⊢ (𝐴 ∈ V → (𝐹‘⦋𝐴 / 𝑥⦌𝑥) = (𝐹‘𝐴)) |
| 4 | 1, 3 | eqtrd 2772 | . 2 ⊢ (𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴)) |
| 5 | csbprc 4363 | . . 3 ⊢ (¬ 𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = ∅) | |
| 6 | fvprc 6834 | . . 3 ⊢ (¬ 𝐴 ∈ V → (𝐹‘𝐴) = ∅) | |
| 7 | 5, 6 | eqtr4d 2775 | . 2 ⊢ (¬ 𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴)) |
| 8 | 4, 7 | pm2.61i 182 | 1 ⊢ ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 = wceq 1542 ∈ wcel 2114 Vcvv 3442 ⦋csb 3851 ∅c0 4287 ‘cfv 6500 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-nul 5253 ax-pr 5379 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-dm 5642 df-iota 6456 df-fv 6508 |
| This theorem is referenced by: mptcoe1fsupp 22168 mptcoe1matfsupp 22758 mp2pm2mplem4 22765 chfacfscmulfsupp 22815 chfacfpmmulfsupp 22819 cpmidpmatlem3 22828 cayhamlem4 22844 cayleyhamilton1 22848 logbmpt 26766 nbgrcl 29420 nbgrnvtx0 29424 iuninc 32646 disjxpin 32674 finixpnum 37850 cdlemkid3N 41303 cdlemkid4 41304 cdlemk39s 41309 mccllem 45951 clnbgrcl 48175 clnbgrnvtx0 48181 |
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