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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 6943 | . 2 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝐵 ∈ 𝐶) → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) = 𝐵) |
| 5 | 1, 2, 4 | syl2anc 590 | 1 ⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1547 ∈ wcel 2119 Ⅎwnfc 2887 ↦ cmpt 5160 ‘cfv 6492 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-sep 5225 ax-pr 5369 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ral 3055 df-rex 3065 df-rab 3393 df-v 3434 df-sbc 3731 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4269 df-if 4462 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-br 5080 df-opab 5142 df-mpt 5161 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-iota 6448 df-fun 6494 df-fv 6500 |
| This theorem is referenced by: (None) |
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