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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 6948 | . 2 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝐵 ∈ 𝐶) → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) = 𝐵) |
| 5 | 1, 2, 4 | syl2anc 585 | 1 ⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 Ⅎwnfc 2883 ↦ cmpt 5166 ‘cfv 6498 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-iota 6454 df-fun 6500 df-fv 6506 |
| This theorem is referenced by: (None) |
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