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| Mirrors > Home > ILE Home > Th. List > fvmpt2 | GIF version | ||
| Description: Value of a function given by the maps-to notation. (Contributed by FL, 21-Jun-2010.) |
| Ref | Expression |
|---|---|
| fvmpt2.1 | ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) |
| Ref | Expression |
|---|---|
| fvmpt2 | ⊢ ((𝑥 ∈ 𝐴 ∧ 𝐵 ∈ 𝐶) → (𝐹‘𝑥) = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | csbeq1 3140 | . . 3 ⊢ (𝑦 = 𝑥 → ⦋𝑦 / 𝑥⦌𝐵 = ⦋𝑥 / 𝑥⦌𝐵) | |
| 2 | csbid 3145 | . . 3 ⊢ ⦋𝑥 / 𝑥⦌𝐵 = 𝐵 | |
| 3 | 1, 2 | eqtrdi 2281 | . 2 ⊢ (𝑦 = 𝑥 → ⦋𝑦 / 𝑥⦌𝐵 = 𝐵) |
| 4 | fvmpt2.1 | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 5 | nfcv 2384 | . . . 4 ⊢ Ⅎ𝑦𝐵 | |
| 6 | nfcsb1v 3170 | . . . 4 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 | |
| 7 | csbeq1a 3146 | . . . 4 ⊢ (𝑥 = 𝑦 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵) | |
| 8 | 5, 6, 7 | cbvmpt 4204 | . . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵) |
| 9 | 4, 8 | eqtri 2253 | . 2 ⊢ 𝐹 = (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵) |
| 10 | 3, 9 | fvmptg 5752 | 1 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝐵 ∈ 𝐶) → (𝐹‘𝑥) = 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1398 ∈ wcel 2203 ⦋csb 3137 ↦ cmpt 4170 ‘cfv 5351 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2206 ax-ext 2214 ax-sep 4227 ax-pow 4286 ax-pr 4321 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-v 2814 df-sbc 3042 df-csb 3138 df-un 3214 df-in 3216 df-ss 3223 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-br 4109 df-opab 4171 df-mpt 4172 df-id 4413 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-iota 5311 df-fun 5353 df-fv 5359 |
| This theorem is referenced by: fvmptssdm 5761 fvmpt2d 5763 fvmptdf 5764 mpteqb 5767 fvmptt 5768 fvmptf 5769 fnmptfvd 5781 ralrnmpt 5818 rexrnmpt 5819 fmptco 5842 f1mpt 5943 offval2 6281 ofrfval2 6282 mptelixpg 6968 dom2lem 7010 mapxpen 7100 xpmapenlem 7101 mkvprop 7448 cc2lem 7576 cc3 7578 fsum3cvg 12057 summodclem2a 12060 fsumf1o 12069 fsum3cvg2 12073 fsumadd 12085 isummulc2 12105 fproddccvg 12251 fprodf1o 12267 prdsbas3 13489 txcnp 15123 cnmpt11 15135 cnmpt1t 15137 elplyd 15593 dvply1 15617 lgseisenlem2 15931 |
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