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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 7400 | . . 3 ⊢ ((𝐴‘𝑥) − (𝐵‘𝑥)) ∈ V | |
| 2 | eqid 2736 | . . 3 ⊢ (𝑥 ∈ ℝ ↦ ((𝐴‘𝑥) − (𝐵‘𝑥))) = (𝑥 ∈ ℝ ↦ ((𝐴‘𝑥) − (𝐵‘𝑥))) | |
| 3 | 1, 2 | fnmpti 6641 | . 2 ⊢ (𝑥 ∈ ℝ ↦ ((𝐴‘𝑥) − (𝐵‘𝑥))) Fn ℝ |
| 4 | subrval 44893 | . . 3 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴-𝑟𝐵) = (𝑥 ∈ ℝ ↦ ((𝐴‘𝑥) − (𝐵‘𝑥)))) | |
| 5 | 4 | fneq1d 6591 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → ((𝐴-𝑟𝐵) Fn ℝ ↔ (𝑥 ∈ ℝ ↦ ((𝐴‘𝑥) − (𝐵‘𝑥))) Fn ℝ)) |
| 6 | 3, 5 | mpbiri 258 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴-𝑟𝐵) Fn ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2114 ↦ cmpt 5166 Fn wfn 6493 ‘cfv 6498 (class class class)co 7367 ℝcr 11037 − cmin 11377 -𝑟cminusr 44884 |
| 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-rep 5212 ax-sep 5231 ax-nul 5241 ax-pr 5375 ax-cnex 11094 ax-resscn 11095 |
| 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-ne 2933 df-ral 3052 df-rex 3062 df-reu 3343 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-iun 4935 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-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-ov 7370 df-oprab 7371 df-mpo 7372 df-subr 44890 |
| This theorem is referenced by: (None) |
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