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Theorem fvpr2g 7179
Description: The value of a function with a domain of (at most) two elements. (Contributed by Alexander van der Vekens, 3-Dec-2017.) (Proof shortened by BJ, 26-Sep-2024.)
Assertion
Ref Expression
fvpr2g ((𝐵𝑉𝐷𝑊𝐴𝐵) → ({⟨𝐴, 𝐶⟩, ⟨𝐵, 𝐷⟩}‘𝐵) = 𝐷)

Proof of Theorem fvpr2g
StepHypRef Expression
1 prcom 4694 . . 3 {⟨𝐴, 𝐶⟩, ⟨𝐵, 𝐷⟩} = {⟨𝐵, 𝐷⟩, ⟨𝐴, 𝐶⟩}
21fveq1i 6872 . 2 ({⟨𝐴, 𝐶⟩, ⟨𝐵, 𝐷⟩}‘𝐵) = ({⟨𝐵, 𝐷⟩, ⟨𝐴, 𝐶⟩}‘𝐵)
3 necom 3013 . . 3 (𝐴𝐵𝐵𝐴)
4 fvpr1g 7178 . . 3 ((𝐵𝑉𝐷𝑊𝐵𝐴) → ({⟨𝐵, 𝐷⟩, ⟨𝐴, 𝐶⟩}‘𝐵) = 𝐷)
53, 4syl3an3b 1428 . 2 ((𝐵𝑉𝐷𝑊𝐴𝐵) → ({⟨𝐵, 𝐷⟩, ⟨𝐴, 𝐶⟩}‘𝐵) = 𝐷)
62, 5eqtrid 2812 1 ((𝐵𝑉𝐷𝑊𝐴𝐵) → ({⟨𝐴, 𝐶⟩, ⟨𝐵, 𝐷⟩}‘𝐵) = 𝐷)
Colors of variables: wff setvar class
Syntax hints:  wi 4  w3a 1101   = wceq 1563  wcel 2145  wne 2960  {cpr 4587  cop 4591  cfv 6525
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-12 2215  ax-ext 2737  ax-sep 5251  ax-nul 5261  ax-pr 5395
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-ne 2961  df-ral 3080  df-rex 3090  df-rab 3418  df-v 3459  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-nul 4289  df-if 4484  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4869  df-br 5106  df-opab 5168  df-id 5547  df-xp 5658  df-rel 5659  df-cnv 5660  df-co 5661  df-dm 5662  df-res 5664  df-iota 6481  df-fun 6527  df-fv 6533
This theorem is referenced by:  fvpr2  7181  fpropnf1  7255  f1prex  7272  wrdlen2i  14969  fvpr1o  17604  linds2eq  33610  zlmodzxzscm  48988  zlmodzxzadd  48989  lincvalpr  49049  ldepspr  49104  2arymptfv  49281  fv2prop  49331  prelrrx2b  49345  line2ylem  49382  line2  49383  line2x  49385  line2y  49386
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