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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 3143 | . . 3 ⊢ (𝑦 = 𝑥 → ⦋𝑦 / 𝑥⦌𝐵 = ⦋𝑥 / 𝑥⦌𝐵) | |
| 2 | csbid 3148 | . . 3 ⊢ ⦋𝑥 / 𝑥⦌𝐵 = 𝐵 | |
| 3 | 1, 2 | eqtrdi 2283 | . 2 ⊢ (𝑦 = 𝑥 → ⦋𝑦 / 𝑥⦌𝐵 = 𝐵) |
| 4 | fvmpt2.1 | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 5 | nfcv 2386 | . . . 4 ⊢ Ⅎ𝑦𝐵 | |
| 6 | nfcsb1v 3173 | . . . 4 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 | |
| 7 | csbeq1a 3149 | . . . 4 ⊢ (𝑥 = 𝑦 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵) | |
| 8 | 5, 6, 7 | cbvmpt 4207 | . . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵) |
| 9 | 4, 8 | eqtri 2255 | . 2 ⊢ 𝐹 = (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵) |
| 10 | 3, 9 | fvmptg 5755 | 1 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝐵 ∈ 𝐶) → (𝐹‘𝑥) = 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1398 ∈ wcel 2205 ⦋csb 3140 ↦ cmpt 4173 ‘cfv 5354 |
| 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 2208 ax-ext 2216 ax-sep 4230 ax-pow 4289 ax-pr 4324 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-v 2817 df-sbc 3045 df-csb 3141 df-un 3217 df-in 3219 df-ss 3226 df-pw 3673 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-br 4112 df-opab 4174 df-mpt 4175 df-id 4416 df-xp 4757 df-rel 4758 df-cnv 4759 df-co 4760 df-dm 4761 df-iota 5314 df-fun 5356 df-fv 5362 |
| This theorem is referenced by: fvmptssdm 5764 fvmpt2d 5766 fvmptdf 5767 mpteqb 5770 fvmptt 5771 fvmptf 5772 fnmptfvd 5784 ralrnmpt 5821 rexrnmpt 5822 fmptco 5845 f1mpt 5946 offval2 6284 ofrfval2 6285 mptelixpg 6971 dom2lem 7013 mapxpen 7103 xpmapenlem 7104 mkvprop 7451 cc2lem 7585 cc3 7587 fsum3cvg 12072 summodclem2a 12075 fsumf1o 12084 fsum3cvg2 12088 fsumadd 12100 isummulc2 12120 fproddccvg 12266 fprodf1o 12282 prdsbas3 13521 txcnp 15185 cnmpt11 15197 cnmpt1t 15199 elplyd 15655 dvply1 15679 lgseisenlem2 15993 |
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