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Theorem pmtrprfv2 33181
Description: In a transposition of two given points, each maps to the other. (Contributed by Thierry Arnoux, 22-Aug-2020.)
Hypothesis
Ref Expression
pmtrprfv2.t 𝑇 = (pmTrsp‘𝐷)
Assertion
Ref Expression
pmtrprfv2 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ((𝑇‘{𝑋, 𝑌})‘𝑌) = 𝑋)

Proof of Theorem pmtrprfv2
StepHypRef Expression
1 prcom 4691 . . . 4 {𝑌, 𝑋} = {𝑋, 𝑌}
21fveq2i 6845 . . 3 (𝑇‘{𝑌, 𝑋}) = (𝑇‘{𝑋, 𝑌})
32fveq1i 6843 . 2 ((𝑇‘{𝑌, 𝑋})‘𝑌) = ((𝑇‘{𝑋, 𝑌})‘𝑌)
4 ancom 460 . . . . 5 ((𝑋𝐷𝑌𝐷) ↔ (𝑌𝐷𝑋𝐷))
5 necom 2986 . . . . 5 (𝑋𝑌𝑌𝑋)
64, 5anbi12i 629 . . . 4 (((𝑋𝐷𝑌𝐷) ∧ 𝑋𝑌) ↔ ((𝑌𝐷𝑋𝐷) ∧ 𝑌𝑋))
7 df-3an 1089 . . . 4 ((𝑋𝐷𝑌𝐷𝑋𝑌) ↔ ((𝑋𝐷𝑌𝐷) ∧ 𝑋𝑌))
8 df-3an 1089 . . . 4 ((𝑌𝐷𝑋𝐷𝑌𝑋) ↔ ((𝑌𝐷𝑋𝐷) ∧ 𝑌𝑋))
96, 7, 83bitr4i 303 . . 3 ((𝑋𝐷𝑌𝐷𝑋𝑌) ↔ (𝑌𝐷𝑋𝐷𝑌𝑋))
10 pmtrprfv2.t . . . 4 𝑇 = (pmTrsp‘𝐷)
1110pmtrprfv 19394 . . 3 ((𝐷𝑉 ∧ (𝑌𝐷𝑋𝐷𝑌𝑋)) → ((𝑇‘{𝑌, 𝑋})‘𝑌) = 𝑋)
129, 11sylan2b 595 . 2 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ((𝑇‘{𝑌, 𝑋})‘𝑌) = 𝑋)
133, 12eqtr3id 2786 1 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ((𝑇‘{𝑋, 𝑌})‘𝑌) = 𝑋)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395  w3a 1087   = wceq 1542  wcel 2114  wne 2933  {cpr 4584  cfv 6500  pmTrspcpmtr 19382
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 2709  ax-rep 5226  ax-sep 5243  ax-nul 5253  ax-pow 5312  ax-pr 5379  ax-un 7690
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 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-reu 3353  df-rab 3402  df-v 3444  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4288  df-if 4482  df-pw 4558  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-iun 4950  df-br 5101  df-opab 5163  df-mpt 5182  df-id 5527  df-xp 5638  df-rel 5639  df-cnv 5640  df-co 5641  df-dm 5642  df-rn 5643  df-res 5644  df-ima 5645  df-suc 6331  df-iota 6456  df-fun 6502  df-fn 6503  df-f 6504  df-f1 6505  df-fo 6506  df-f1o 6507  df-fv 6508  df-1o 8407  df-2o 8408  df-en 8896  df-pmtr 19383
This theorem is referenced by:  pmtrcnel  33182  fzo0pmtrlast  33185  pmtridfv2  33189  psgnfzto1stlem  33193
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