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Theorem pmtrprfv 19471
Description: In a transposition of two given points, each maps to the other. (Contributed by Stefan O'Rear, 25-Aug-2015.)
Hypothesis
Ref Expression
pmtrfval.t 𝑇 = (pmTrsp‘𝐷)
Assertion
Ref Expression
pmtrprfv ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ((𝑇‘{𝑋, 𝑌})‘𝑋) = 𝑌)

Proof of Theorem pmtrprfv
StepHypRef Expression
1 simpl 482 . . 3 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝐷𝑉)
2 simpr1 1195 . . . 4 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑋𝐷)
3 simpr2 1196 . . . 4 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑌𝐷)
42, 3prssd 4822 . . 3 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → {𝑋, 𝑌} ⊆ 𝐷)
5 enpr2 10042 . . . 4 ((𝑋𝐷𝑌𝐷𝑋𝑌) → {𝑋, 𝑌} ≈ 2o)
65adantl 481 . . 3 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → {𝑋, 𝑌} ≈ 2o)
7 pmtrfval.t . . . 4 𝑇 = (pmTrsp‘𝐷)
87pmtrfv 19470 . . 3 (((𝐷𝑉 ∧ {𝑋, 𝑌} ⊆ 𝐷 ∧ {𝑋, 𝑌} ≈ 2o) ∧ 𝑋𝐷) → ((𝑇‘{𝑋, 𝑌})‘𝑋) = if(𝑋 ∈ {𝑋, 𝑌}, ({𝑋, 𝑌} ∖ {𝑋}), 𝑋))
91, 4, 6, 2, 8syl31anc 1375 . 2 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ((𝑇‘{𝑋, 𝑌})‘𝑋) = if(𝑋 ∈ {𝑋, 𝑌}, ({𝑋, 𝑌} ∖ {𝑋}), 𝑋))
10 prid1g 4760 . . . . 5 (𝑋𝐷𝑋 ∈ {𝑋, 𝑌})
112, 10syl 17 . . . 4 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑋 ∈ {𝑋, 𝑌})
1211iftrued 4533 . . 3 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → if(𝑋 ∈ {𝑋, 𝑌}, ({𝑋, 𝑌} ∖ {𝑋}), 𝑋) = ({𝑋, 𝑌} ∖ {𝑋}))
13 difprsnss 4799 . . . . . . 7 ({𝑋, 𝑌} ∖ {𝑋}) ⊆ {𝑌}
1413a1i 11 . . . . . 6 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ({𝑋, 𝑌} ∖ {𝑋}) ⊆ {𝑌})
15 prid2g 4761 . . . . . . . . 9 (𝑌𝐷𝑌 ∈ {𝑋, 𝑌})
163, 15syl 17 . . . . . . . 8 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑌 ∈ {𝑋, 𝑌})
17 simpr3 1197 . . . . . . . . 9 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑋𝑌)
1817necomd 2996 . . . . . . . 8 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑌𝑋)
19 eldifsn 4786 . . . . . . . 8 (𝑌 ∈ ({𝑋, 𝑌} ∖ {𝑋}) ↔ (𝑌 ∈ {𝑋, 𝑌} ∧ 𝑌𝑋))
2016, 18, 19sylanbrc 583 . . . . . . 7 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑌 ∈ ({𝑋, 𝑌} ∖ {𝑋}))
2120snssd 4809 . . . . . 6 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → {𝑌} ⊆ ({𝑋, 𝑌} ∖ {𝑋}))
2214, 21eqssd 4001 . . . . 5 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ({𝑋, 𝑌} ∖ {𝑋}) = {𝑌})
2322unieqd 4920 . . . 4 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ({𝑋, 𝑌} ∖ {𝑋}) = {𝑌})
24 unisng 4925 . . . . 5 (𝑌𝐷 {𝑌} = 𝑌)
253, 24syl 17 . . . 4 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → {𝑌} = 𝑌)
2623, 25eqtrd 2777 . . 3 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ({𝑋, 𝑌} ∖ {𝑋}) = 𝑌)
2712, 26eqtrd 2777 . 2 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → if(𝑋 ∈ {𝑋, 𝑌}, ({𝑋, 𝑌} ∖ {𝑋}), 𝑋) = 𝑌)
289, 27eqtrd 2777 1 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ((𝑇‘{𝑋, 𝑌})‘𝑋) = 𝑌)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395  w3a 1087   = wceq 1540  wcel 2108  wne 2940  cdif 3948  wss 3951  ifcif 4525  {csn 4626  {cpr 4628   cuni 4907   class class class wbr 5143  cfv 6561  2oc2o 8500  cen 8982  pmTrspcpmtr 19459
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 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2708  ax-rep 5279  ax-sep 5296  ax-nul 5306  ax-pow 5365  ax-pr 5432  ax-un 7755
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2540  df-eu 2569  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2892  df-ne 2941  df-ral 3062  df-rex 3071  df-reu 3381  df-rab 3437  df-v 3482  df-sbc 3789  df-csb 3900  df-dif 3954  df-un 3956  df-in 3958  df-ss 3968  df-nul 4334  df-if 4526  df-pw 4602  df-sn 4627  df-pr 4629  df-op 4633  df-uni 4908  df-iun 4993  df-br 5144  df-opab 5206  df-mpt 5226  df-id 5578  df-xp 5691  df-rel 5692  df-cnv 5693  df-co 5694  df-dm 5695  df-rn 5696  df-res 5697  df-ima 5698  df-suc 6390  df-iota 6514  df-fun 6563  df-fn 6564  df-f 6565  df-f1 6566  df-fo 6567  df-f1o 6568  df-fv 6569  df-1o 8506  df-2o 8507  df-en 8986  df-pmtr 19460
This theorem is referenced by:  symggen  19488  pmtr3ncomlem1  19491  mdetralt  22614  mdetunilem7  22624  pmtrprfv2  33108  pmtridfv1  33115  psgnfzto1stlem  33120
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