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Theorem pmtrprfv2 33052
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 4699 . . . 4 {𝑌, 𝑋} = {𝑋, 𝑌}
21fveq2i 6864 . . 3 (𝑇‘{𝑌, 𝑋}) = (𝑇‘{𝑋, 𝑌})
32fveq1i 6862 . 2 ((𝑇‘{𝑌, 𝑋})‘𝑌) = ((𝑇‘{𝑋, 𝑌})‘𝑌)
4 ancom 460 . . . . 5 ((𝑋𝐷𝑌𝐷) ↔ (𝑌𝐷𝑋𝐷))
5 necom 2979 . . . . 5 (𝑋𝑌𝑌𝑋)
64, 5anbi12i 628 . . . 4 (((𝑋𝐷𝑌𝐷) ∧ 𝑋𝑌) ↔ ((𝑌𝐷𝑋𝐷) ∧ 𝑌𝑋))
7 df-3an 1088 . . . 4 ((𝑋𝐷𝑌𝐷𝑋𝑌) ↔ ((𝑋𝐷𝑌𝐷) ∧ 𝑋𝑌))
8 df-3an 1088 . . . 4 ((𝑌𝐷𝑋𝐷𝑌𝑋) ↔ ((𝑌𝐷𝑋𝐷) ∧ 𝑌𝑋))
96, 7, 83bitr4i 303 . . 3 ((𝑋𝐷𝑌𝐷𝑋𝑌) ↔ (𝑌𝐷𝑋𝐷𝑌𝑋))
10 pmtrprfv2.t . . . 4 𝑇 = (pmTrsp‘𝐷)
1110pmtrprfv 19390 . . 3 ((𝐷𝑉 ∧ (𝑌𝐷𝑋𝐷𝑌𝑋)) → ((𝑇‘{𝑌, 𝑋})‘𝑌) = 𝑋)
129, 11sylan2b 594 . 2 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ((𝑇‘{𝑌, 𝑋})‘𝑌) = 𝑋)
133, 12eqtr3id 2779 1 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ((𝑇‘{𝑋, 𝑌})‘𝑌) = 𝑋)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395  w3a 1086   = wceq 1540  wcel 2109  wne 2926  {cpr 4594  cfv 6514  pmTrspcpmtr 19378
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2702  ax-rep 5237  ax-sep 5254  ax-nul 5264  ax-pow 5323  ax-pr 5390  ax-un 7714
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2534  df-eu 2563  df-clab 2709  df-cleq 2722  df-clel 2804  df-nfc 2879  df-ne 2927  df-ral 3046  df-rex 3055  df-reu 3357  df-rab 3409  df-v 3452  df-sbc 3757  df-csb 3866  df-dif 3920  df-un 3922  df-in 3924  df-ss 3934  df-nul 4300  df-if 4492  df-pw 4568  df-sn 4593  df-pr 4595  df-op 4599  df-uni 4875  df-iun 4960  df-br 5111  df-opab 5173  df-mpt 5192  df-id 5536  df-xp 5647  df-rel 5648  df-cnv 5649  df-co 5650  df-dm 5651  df-rn 5652  df-res 5653  df-ima 5654  df-suc 6341  df-iota 6467  df-fun 6516  df-fn 6517  df-f 6518  df-f1 6519  df-fo 6520  df-f1o 6521  df-fv 6522  df-1o 8437  df-2o 8438  df-en 8922  df-pmtr 19379
This theorem is referenced by:  pmtrcnel  33053  fzo0pmtrlast  33056  pmtridfv2  33060  psgnfzto1stlem  33064
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