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| Mirrors > Home > MPE Home > Th. List > Mathboxes > mulvfv | Structured version Visualization version GIF version | ||
| Description: Scalar multiplication at a value. (Contributed by Andrew Salmon, 27-Jan-2012.) |
| Ref | Expression |
|---|---|
| mulvfv | ⊢ ((𝐴 ∈ 𝐸 ∧ 𝐵 ∈ 𝐷 ∧ 𝐶 ∈ ℝ) → ((𝐴.𝑣𝐵)‘𝐶) = (𝐴 · (𝐵‘𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mulvval 44624 | . . . 4 ⊢ ((𝐴 ∈ 𝐸 ∧ 𝐵 ∈ 𝐷) → (𝐴.𝑣𝐵) = (𝑥 ∈ ℝ ↦ (𝐴 · (𝐵‘𝑥)))) | |
| 2 | 1 | fveq1d 6833 | . . 3 ⊢ ((𝐴 ∈ 𝐸 ∧ 𝐵 ∈ 𝐷) → ((𝐴.𝑣𝐵)‘𝐶) = ((𝑥 ∈ ℝ ↦ (𝐴 · (𝐵‘𝑥)))‘𝐶)) |
| 3 | fveq2 6831 | . . . . 5 ⊢ (𝑥 = 𝐶 → (𝐵‘𝑥) = (𝐵‘𝐶)) | |
| 4 | 3 | oveq2d 7371 | . . . 4 ⊢ (𝑥 = 𝐶 → (𝐴 · (𝐵‘𝑥)) = (𝐴 · (𝐵‘𝐶))) |
| 5 | eqid 2733 | . . . 4 ⊢ (𝑥 ∈ ℝ ↦ (𝐴 · (𝐵‘𝑥))) = (𝑥 ∈ ℝ ↦ (𝐴 · (𝐵‘𝑥))) | |
| 6 | ovex 7388 | . . . 4 ⊢ (𝐴 · (𝐵‘𝐶)) ∈ V | |
| 7 | 4, 5, 6 | fvmpt 6938 | . . 3 ⊢ (𝐶 ∈ ℝ → ((𝑥 ∈ ℝ ↦ (𝐴 · (𝐵‘𝑥)))‘𝐶) = (𝐴 · (𝐵‘𝐶))) |
| 8 | 2, 7 | sylan9eq 2788 | . 2 ⊢ (((𝐴 ∈ 𝐸 ∧ 𝐵 ∈ 𝐷) ∧ 𝐶 ∈ ℝ) → ((𝐴.𝑣𝐵)‘𝐶) = (𝐴 · (𝐵‘𝐶))) |
| 9 | 8 | 3impa 1109 | 1 ⊢ ((𝐴 ∈ 𝐸 ∧ 𝐵 ∈ 𝐷 ∧ 𝐶 ∈ ℝ) → ((𝐴.𝑣𝐵)‘𝐶) = (𝐴 · (𝐵‘𝐶))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1086 = wceq 1541 ∈ wcel 2113 ↦ cmpt 5176 ‘cfv 6489 (class class class)co 7355 ℝcr 11016 · cmul 11022 .𝑣ctimesr 44615 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pr 5374 ax-cnex 11073 ax-resscn 11074 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-ral 3049 df-rex 3058 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4283 df-if 4477 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-iun 4945 df-br 5096 df-opab 5158 df-mpt 5177 df-id 5516 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-ov 7358 df-oprab 7359 df-mpo 7360 df-mulv 44621 |
| This theorem is referenced by: (None) |
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