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Theorem pmtrprfv2 33389
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 6886 . . 3 (𝑇‘{𝑌, 𝑋}) = (𝑇‘{𝑋, 𝑌})
32fveq1i 6884 . 2 ((𝑇‘{𝑌, 𝑋})‘𝑌) = ((𝑇‘{𝑋, 𝑌})‘𝑌)
4 ancom 465 . . . . 5 ((𝑋𝐷𝑌𝐷) ↔ (𝑌𝐷𝑋𝐷))
5 necom 3011 . . . . 5 (𝑋𝑌𝑌𝑋)
64, 5anbi12i 639 . . . 4 (((𝑋𝐷𝑌𝐷) ∧ 𝑋𝑌) ↔ ((𝑌𝐷𝑋𝐷) ∧ 𝑌𝑋))
7 df-3an 1105 . . . 4 ((𝑋𝐷𝑌𝐷𝑋𝑌) ↔ ((𝑋𝐷𝑌𝐷) ∧ 𝑋𝑌))
8 df-3an 1105 . . . 4 ((𝑌𝐷𝑋𝐷𝑌𝑋) ↔ ((𝑌𝐷𝑋𝐷) ∧ 𝑌𝑋))
96, 7, 83bitr4i 306 . . 3 ((𝑋𝐷𝑌𝐷𝑋𝑌) ↔ (𝑌𝐷𝑋𝐷𝑌𝑋))
10 pmtrprfv2.t . . . 4 𝑇 = (pmTrsp‘𝐷)
1110pmtrprfv 19524 . . 3 ((𝐷𝑉 ∧ (𝑌𝐷𝑋𝐷𝑌𝑋)) → ((𝑇‘{𝑌, 𝑋})‘𝑌) = 𝑋)
129, 11sylan2b 605 . 2 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ((𝑇‘{𝑌, 𝑋})‘𝑌) = 𝑋)
133, 12eqtr3id 2812 1 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ((𝑇‘{𝑋, 𝑌})‘𝑌) = 𝑋)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400  w3a 1103   = wceq 1570  wcel 2143  wne 2958  {cpr 4592  cfv 6538  pmTrspcpmtr 19512
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-rep 5239  ax-sep 5258  ax-nul 5270  ax-pow 5338  ax-pr 5406  ax-un 7734
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-reu 3370  df-rab 3417  df-v 3457  df-sbc 3746  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-iun 4959  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-suc 6368  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-f1 6543  df-fo 6544  df-f1o 6545  df-fv 6546  df-1o 8454  df-2o 8455  df-en 8945  df-pmtr 19513
This theorem is referenced by:  pmtrcnel  33390  fzo0pmtrlast  33393  pmtridfv2  33397  psgnfzto1stlem  33401
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