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| Mirrors > Home > MPE Home > Th. List > Mathboxes > mulvfn | Structured version Visualization version GIF version | ||
| Description: Scalar multiplication producees a function. (Contributed by Andrew Salmon, 27-Jan-2012.) |
| Ref | Expression |
|---|---|
| mulvfn | ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴.𝑣𝐵) Fn ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ovex 7456 | . . 3 ⊢ (𝐴 · (𝐵‘𝑥)) ∈ V | |
| 2 | eqid 2766 | . . 3 ⊢ (𝑥 ∈ ℝ ↦ (𝐴 · (𝐵‘𝑥))) = (𝑥 ∈ ℝ ↦ (𝐴 · (𝐵‘𝑥))) | |
| 3 | 1, 2 | fnmpti 6685 | . 2 ⊢ (𝑥 ∈ ℝ ↦ (𝐴 · (𝐵‘𝑥))) Fn ℝ |
| 4 | mulvval 45217 | . . 3 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴.𝑣𝐵) = (𝑥 ∈ ℝ ↦ (𝐴 · (𝐵‘𝑥)))) | |
| 5 | 4 | fneq1d 6635 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → ((𝐴.𝑣𝐵) Fn ℝ ↔ (𝑥 ∈ ℝ ↦ (𝐴 · (𝐵‘𝑥))) Fn ℝ)) |
| 6 | 3, 5 | mpbiri 261 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴.𝑣𝐵) Fn ℝ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2146 ↦ cmpt 5197 Fn wfn 6538 ‘cfv 6543 (class class class)co 7423 ℝcr 11117 · cmul 11123 .𝑣ctimesr 45208 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pr 5409 ax-cnex 11174 ax-resscn 11175 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-ral 3083 df-rex 3093 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-id 5561 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-ov 7426 df-oprab 7427 df-mpo 7428 df-mulv 45214 |
| This theorem is used by: (None) |
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