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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 3087 | . . 3 ⊢ (𝑦 = 𝑥 → ⦋𝑦 / 𝑥⦌𝐵 = ⦋𝑥 / 𝑥⦌𝐵) | |
| 2 | csbid 3092 | . . 3 ⊢ ⦋𝑥 / 𝑥⦌𝐵 = 𝐵 | |
| 3 | 1, 2 | eqtrdi 2245 | . 2 ⊢ (𝑦 = 𝑥 → ⦋𝑦 / 𝑥⦌𝐵 = 𝐵) |
| 4 | fvmpt2.1 | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 5 | nfcv 2339 | . . . 4 ⊢ Ⅎ𝑦𝐵 | |
| 6 | nfcsb1v 3117 | . . . 4 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 | |
| 7 | csbeq1a 3093 | . . . 4 ⊢ (𝑥 = 𝑦 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵) | |
| 8 | 5, 6, 7 | cbvmpt 4129 | . . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵) |
| 9 | 4, 8 | eqtri 2217 | . 2 ⊢ 𝐹 = (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵) |
| 10 | 3, 9 | fvmptg 5640 | 1 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝐵 ∈ 𝐶) → (𝐹‘𝑥) = 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1364 ∈ wcel 2167 ⦋csb 3084 ↦ cmpt 4095 ‘cfv 5259 |
| 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 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-v 2765 df-sbc 2990 df-csb 3085 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-br 4035 df-opab 4096 df-mpt 4097 df-id 4329 df-xp 4670 df-rel 4671 df-cnv 4672 df-co 4673 df-dm 4674 df-iota 5220 df-fun 5261 df-fv 5267 |
| This theorem is referenced by: fvmptssdm 5649 fvmpt2d 5651 fvmptdf 5652 mpteqb 5655 fvmptt 5656 fvmptf 5657 fnmptfvd 5669 ralrnmpt 5707 rexrnmpt 5708 fmptco 5731 f1mpt 5821 offval2 6155 ofrfval2 6156 mptelixpg 6802 dom2lem 6840 mapxpen 6918 xpmapenlem 6919 mkvprop 7233 cc2lem 7349 cc3 7351 fsum3cvg 11560 summodclem2a 11563 fsumf1o 11572 fsum3cvg2 11576 fsumadd 11588 isummulc2 11608 fproddccvg 11754 fprodf1o 11770 prdsbas3 12989 txcnp 14591 cnmpt11 14603 cnmpt1t 14605 elplyd 15061 dvply1 15085 lgseisenlem2 15396 |
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