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Mirrors > Home > MPE Home > Th. List > Mathboxes > subrfn | Structured version Visualization version GIF version |
Description: Vector subtraction produces a function. (Contributed by Andrew Salmon, 27-Jan-2012.) |
Ref | Expression |
---|---|
subrfn | ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴-𝑟𝐵) Fn ℝ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ovex 7288 | . . 3 ⊢ ((𝐴‘𝑥) − (𝐵‘𝑥)) ∈ V | |
2 | eqid 2738 | . . 3 ⊢ (𝑥 ∈ ℝ ↦ ((𝐴‘𝑥) − (𝐵‘𝑥))) = (𝑥 ∈ ℝ ↦ ((𝐴‘𝑥) − (𝐵‘𝑥))) | |
3 | 1, 2 | fnmpti 6560 | . 2 ⊢ (𝑥 ∈ ℝ ↦ ((𝐴‘𝑥) − (𝐵‘𝑥))) Fn ℝ |
4 | subrval 41974 | . . 3 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴-𝑟𝐵) = (𝑥 ∈ ℝ ↦ ((𝐴‘𝑥) − (𝐵‘𝑥)))) | |
5 | 4 | fneq1d 6510 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → ((𝐴-𝑟𝐵) Fn ℝ ↔ (𝑥 ∈ ℝ ↦ ((𝐴‘𝑥) − (𝐵‘𝑥))) Fn ℝ)) |
6 | 3, 5 | mpbiri 257 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴-𝑟𝐵) Fn ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2108 ↦ cmpt 5153 Fn wfn 6413 ‘cfv 6418 (class class class)co 7255 ℝcr 10801 − cmin 11135 -𝑟cminusr 41965 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pr 5347 ax-cnex 10858 ax-resscn 10859 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-ov 7258 df-oprab 7259 df-mpo 7260 df-subr 41971 |
This theorem is referenced by: (None) |
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