| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 6928 | . . 3 ⊢ (𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘⦋𝐴 / 𝑥⦌𝑥)) | |
| 2 | csbvarg 4395 | . . . 4 ⊢ (𝐴 ∈ V → ⦋𝐴 / 𝑥⦌𝑥 = 𝐴) | |
| 3 | 2 | fveq2d 6886 | . . 3 ⊢ (𝐴 ∈ V → (𝐹‘⦋𝐴 / 𝑥⦌𝑥) = (𝐹‘𝐴)) |
| 4 | 1, 3 | eqtrd 2797 | . 2 ⊢ (𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴)) |
| 5 | csbprc 4370 | . . 3 ⊢ (¬ 𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = ∅) | |
| 6 | fvprc 6874 | . . 3 ⊢ (¬ 𝐴 ∈ V → (𝐹‘𝐴) = ∅) | |
| 7 | 5, 6 | eqtr4d 2800 | . 2 ⊢ (¬ 𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴)) |
| 8 | 4, 7 | pm2.61i 184 | 1 ⊢ ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 = wceq 1570 ∈ wcel 2145 Vcvv 3453 ⦋csb 3850 ∅c0 4282 ‘cfv 6537 |
| 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 2215 ax-ext 2734 ax-nul 5267 ax-pr 5402 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-dm 5669 df-iota 6493 df-fv 6545 |
| This theorem is used by: mptcoe1fsupp 22446 mptcoe1matfsupp 23033 mp2pm2mplem4 23040 chfacfscmulfsupp 23090 chfacfpmmulfsupp 23094 cpmidpmatlem3 23103 cayhamlem4 23119 cayleyhamilton1 23123 logbmpt 27033 nbgrcl 29803 nbgrnvtx0 29807 iuninc 33042 disjxpin 33069 finixpnum 38367 cdlemkid3N 41814 cdlemkid4 41815 cdlemk39s 41820 mccllem 46435 clnbgrcl 48745 clnbgrnvtx0 48751 veroquadmodzerod 50825 |
| Copyright terms: Public domain | W3C validator |