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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 3129 | . . 3 ⊢ (𝑦 = 𝑥 → ⦋𝑦 / 𝑥⦌𝐵 = ⦋𝑥 / 𝑥⦌𝐵) | |
| 2 | csbid 3134 | . . 3 ⊢ ⦋𝑥 / 𝑥⦌𝐵 = 𝐵 | |
| 3 | 1, 2 | eqtrdi 2279 | . 2 ⊢ (𝑦 = 𝑥 → ⦋𝑦 / 𝑥⦌𝐵 = 𝐵) |
| 4 | fvmpt2.1 | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 5 | nfcv 2373 | . . . 4 ⊢ Ⅎ𝑦𝐵 | |
| 6 | nfcsb1v 3159 | . . . 4 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 | |
| 7 | csbeq1a 3135 | . . . 4 ⊢ (𝑥 = 𝑦 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵) | |
| 8 | 5, 6, 7 | cbvmpt 4185 | . . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵) |
| 9 | 4, 8 | eqtri 2251 | . 2 ⊢ 𝐹 = (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵) |
| 10 | 3, 9 | fvmptg 5725 | 1 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝐵 ∈ 𝐶) → (𝐹‘𝑥) = 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1397 ∈ wcel 2201 ⦋csb 3126 ↦ cmpt 4151 ‘cfv 5328 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2204 ax-ext 2212 ax-sep 4208 ax-pow 4266 ax-pr 4301 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1810 df-eu 2081 df-mo 2082 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ral 2514 df-rex 2515 df-v 2803 df-sbc 3031 df-csb 3127 df-un 3203 df-in 3205 df-ss 3212 df-pw 3655 df-sn 3676 df-pr 3677 df-op 3679 df-uni 3895 df-br 4090 df-opab 4152 df-mpt 4153 df-id 4392 df-xp 4733 df-rel 4734 df-cnv 4735 df-co 4736 df-dm 4737 df-iota 5288 df-fun 5330 df-fv 5336 |
| This theorem is referenced by: fvmptssdm 5734 fvmpt2d 5736 fvmptdf 5737 mpteqb 5740 fvmptt 5741 fvmptf 5742 fnmptfvd 5754 ralrnmpt 5792 rexrnmpt 5793 fmptco 5816 f1mpt 5917 offval2 6256 ofrfval2 6257 mptelixpg 6908 dom2lem 6950 mapxpen 7039 xpmapenlem 7040 mkvprop 7362 cc2lem 7490 cc3 7492 fsum3cvg 11962 summodclem2a 11965 fsumf1o 11974 fsum3cvg2 11978 fsumadd 11990 isummulc2 12010 fproddccvg 12156 fprodf1o 12172 prdsbas3 13393 txcnp 15024 cnmpt11 15036 cnmpt1t 15038 elplyd 15494 dvply1 15518 lgseisenlem2 15829 |
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