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Theorem subrfv 45065
Description: Vector subtraction at a value. (Contributed by Andrew Salmon, 27-Jan-2012.)
Assertion
Ref Expression
subrfv ((𝐴𝐸𝐵𝐷𝐶 ∈ ℝ) → ((𝐴-𝑟𝐵)‘𝐶) = ((𝐴𝐶) − (𝐵𝐶)))

Proof of Theorem subrfv
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 subrval 45062 . . . 4 ((𝐴𝐸𝐵𝐷) → (𝐴-𝑟𝐵) = (𝑥 ∈ ℝ ↦ ((𝐴𝑥) − (𝐵𝑥))))
21fveq1d 6881 . . 3 ((𝐴𝐸𝐵𝐷) → ((𝐴-𝑟𝐵)‘𝐶) = ((𝑥 ∈ ℝ ↦ ((𝐴𝑥) − (𝐵𝑥)))‘𝐶))
3 fveq2 6879 . . . . 5 (𝑥 = 𝐶 → (𝐴𝑥) = (𝐴𝐶))
4 fveq2 6879 . . . . 5 (𝑥 = 𝐶 → (𝐵𝑥) = (𝐵𝐶))
53, 4oveq12d 7426 . . . 4 (𝑥 = 𝐶 → ((𝐴𝑥) − (𝐵𝑥)) = ((𝐴𝐶) − (𝐵𝐶)))
6 eqid 2769 . . . 4 (𝑥 ∈ ℝ ↦ ((𝐴𝑥) − (𝐵𝑥))) = (𝑥 ∈ ℝ ↦ ((𝐴𝑥) − (𝐵𝑥)))
7 ovex 7441 . . . 4 ((𝐴𝐶) − (𝐵𝐶)) ∈ V
85, 6, 7fvmpt 6987 . . 3 (𝐶 ∈ ℝ → ((𝑥 ∈ ℝ ↦ ((𝐴𝑥) − (𝐵𝑥)))‘𝐶) = ((𝐴𝐶) − (𝐵𝐶)))
92, 8sylan9eq 2824 . 2 (((𝐴𝐸𝐵𝐷) ∧ 𝐶 ∈ ℝ) → ((𝐴-𝑟𝐵)‘𝐶) = ((𝐴𝐶) − (𝐵𝐶)))
1093impa 1125 1 ((𝐴𝐸𝐵𝐷𝐶 ∈ ℝ) → ((𝐴-𝑟𝐵)‘𝐶) = ((𝐴𝐶) − (𝐵𝐶)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400  w3a 1101   = wceq 1567  wcel 2149  cmpt 5193  cfv 6534  (class class class)co 7408  cr 11095  cmin 11437  -𝑟cminusr 45053
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-rep 5239  ax-sep 5258  ax-nul 5268  ax-pr 5402  ax-cnex 11152  ax-resscn 11153
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-reu 3377  df-rab 3424  df-v 3465  df-sbc 3754  df-csb 3862  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4490  df-sn 4592  df-pr 4594  df-op 4598  df-uni 4874  df-iun 4959  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5554  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-rn 5670  df-res 5671  df-ima 5672  df-iota 6490  df-fun 6536  df-fn 6537  df-f 6538  df-f1 6539  df-fo 6540  df-f1o 6541  df-fv 6542  df-ov 7411  df-oprab 7412  df-mpo 7413  df-subr 45059
This theorem is referenced by: (None)
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