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Theorem addrfn 43788
Description: Vector addition produces a function. (Contributed by Andrew Salmon, 27-Jan-2012.)
Assertion
Ref Expression
addrfn ((𝐴𝐶𝐵𝐷) → (𝐴+𝑟𝐵) Fn ℝ)

Proof of Theorem addrfn
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 ovex 7437 . . 3 ((𝐴𝑥) + (𝐵𝑥)) ∈ V
2 eqid 2726 . . 3 (𝑥 ∈ ℝ ↦ ((𝐴𝑥) + (𝐵𝑥))) = (𝑥 ∈ ℝ ↦ ((𝐴𝑥) + (𝐵𝑥)))
31, 2fnmpti 6686 . 2 (𝑥 ∈ ℝ ↦ ((𝐴𝑥) + (𝐵𝑥))) Fn ℝ
4 addrval 43782 . . 3 ((𝐴𝐶𝐵𝐷) → (𝐴+𝑟𝐵) = (𝑥 ∈ ℝ ↦ ((𝐴𝑥) + (𝐵𝑥))))
54fneq1d 6635 . 2 ((𝐴𝐶𝐵𝐷) → ((𝐴+𝑟𝐵) Fn ℝ ↔ (𝑥 ∈ ℝ ↦ ((𝐴𝑥) + (𝐵𝑥))) Fn ℝ))
63, 5mpbiri 258 1 ((𝐴𝐶𝐵𝐷) → (𝐴+𝑟𝐵) Fn ℝ)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395  wcel 2098  cmpt 5224   Fn wfn 6531  cfv 6536  (class class class)co 7404  cr 11108   + caddc 11112  +𝑟cplusr 43773
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-10 2129  ax-11 2146  ax-12 2163  ax-ext 2697  ax-rep 5278  ax-sep 5292  ax-nul 5299  ax-pr 5420  ax-cnex 11165  ax-resscn 11166
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 845  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-nf 1778  df-sb 2060  df-mo 2528  df-eu 2557  df-clab 2704  df-cleq 2718  df-clel 2804  df-nfc 2879  df-ne 2935  df-ral 3056  df-rex 3065  df-reu 3371  df-rab 3427  df-v 3470  df-sbc 3773  df-csb 3889  df-dif 3946  df-un 3948  df-in 3950  df-ss 3960  df-nul 4318  df-if 4524  df-sn 4624  df-pr 4626  df-op 4630  df-uni 4903  df-iun 4992  df-br 5142  df-opab 5204  df-mpt 5225  df-id 5567  df-xp 5675  df-rel 5676  df-cnv 5677  df-co 5678  df-dm 5679  df-rn 5680  df-res 5681  df-ima 5682  df-iota 6488  df-fun 6538  df-fn 6539  df-f 6540  df-f1 6541  df-fo 6542  df-f1o 6543  df-fv 6544  df-ov 7407  df-oprab 7408  df-mpo 7409  df-addr 43779
This theorem is referenced by:  addrcom  43791
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