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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fvmpt4d | Structured version Visualization version GIF version | ||
| Description: Value of a function given by the maps-to notation. (Contributed by Glauco Siliprandi, 15-Feb-2025.) |
| Ref | Expression |
|---|---|
| fvmpt4d.1 | ⊢ Ⅎ𝑥𝐴 |
| fvmpt4d.2 | ⊢ (𝜑 → 𝐵 ∈ 𝐶) |
| fvmpt4d.3 | ⊢ (𝜑 → 𝑥 ∈ 𝐴) |
| Ref | Expression |
|---|---|
| fvmpt4d | ⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fvmpt4d.3 | . 2 ⊢ (𝜑 → 𝑥 ∈ 𝐴) | |
| 2 | fvmpt4d.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ 𝐶) | |
| 3 | fvmpt4d.1 | . . 3 ⊢ Ⅎ𝑥𝐴 | |
| 4 | 3 | fvmpt2f 6980 | . 2 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝐵 ∈ 𝐶) → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) = 𝐵) |
| 5 | 1, 2, 4 | syl2anc 595 | 1 ⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1563 ∈ wcel 2145 Ⅎwnfc 2912 ↦ cmpt 5185 ‘cfv 6525 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5250 ax-pr 5394 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ral 3080 df-rex 3090 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-br 5105 df-opab 5167 df-mpt 5186 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-iota 6481 df-fun 6527 df-fv 6533 |
| This theorem is referenced by: (None) |
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