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Theorem pmtrprfv 19484
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 486 . . 3 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝐷𝑉)
2 simpr1 1207 . . . 4 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑋𝐷)
3 simpr2 1208 . . . 4 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑌𝐷)
42, 3prssd 4777 . . 3 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → {𝑋, 𝑌} ⊆ 𝐷)
5 enpr2 9954 . . . 4 ((𝑋𝐷𝑌𝐷𝑋𝑌) → {𝑋, 𝑌} ≈ 2o)
65adantl 485 . . 3 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → {𝑋, 𝑌} ≈ 2o)
7 pmtrfval.t . . . 4 𝑇 = (pmTrsp‘𝐷)
87pmtrfv 19483 . . 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 1391 . 2 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ((𝑇‘{𝑋, 𝑌})‘𝑋) = if(𝑋 ∈ {𝑋, 𝑌}, ({𝑋, 𝑌} ∖ {𝑋}), 𝑋))
10 prid1g 4716 . . . . 5 (𝑋𝐷𝑋 ∈ {𝑋, 𝑌})
112, 10syl 17 . . . 4 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑋 ∈ {𝑋, 𝑌})
1211iftrued 4485 . . 3 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → if(𝑋 ∈ {𝑋, 𝑌}, ({𝑋, 𝑌} ∖ {𝑋}), 𝑋) = ({𝑋, 𝑌} ∖ {𝑋}))
13 difprsnss 4756 . . . . . . 7 ({𝑋, 𝑌} ∖ {𝑋}) ⊆ {𝑌}
1413a1i 11 . . . . . 6 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ({𝑋, 𝑌} ∖ {𝑋}) ⊆ {𝑌})
15 prid2g 4717 . . . . . . . . 9 (𝑌𝐷𝑌 ∈ {𝑋, 𝑌})
163, 15syl 17 . . . . . . . 8 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑌 ∈ {𝑋, 𝑌})
17 simpr3 1209 . . . . . . . . 9 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑋𝑌)
1817necomd 3011 . . . . . . . 8 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑌𝑋)
19 eldifsn 4743 . . . . . . . 8 (𝑌 ∈ ({𝑋, 𝑌} ∖ {𝑋}) ↔ (𝑌 ∈ {𝑋, 𝑌} ∧ 𝑌𝑋))
2016, 18, 19sylanbrc 592 . . . . . . 7 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → 𝑌 ∈ ({𝑋, 𝑌} ∖ {𝑋}))
2120snssd 4742 . . . . . 6 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → {𝑌} ⊆ ({𝑋, 𝑌} ∖ {𝑋}))
2214, 21eqssd 3951 . . . . 5 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ({𝑋, 𝑌} ∖ {𝑋}) = {𝑌})
2322unieqd 4875 . . . 4 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ({𝑋, 𝑌} ∖ {𝑋}) = {𝑌})
24 unisng 4880 . . . . 5 (𝑌𝐷 {𝑌} = 𝑌)
253, 24syl 17 . . . 4 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → {𝑌} = 𝑌)
2623, 25eqtrd 2796 . . 3 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ({𝑋, 𝑌} ∖ {𝑋}) = 𝑌)
2712, 26eqtrd 2796 . 2 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → if(𝑋 ∈ {𝑋, 𝑌}, ({𝑋, 𝑌} ∖ {𝑋}), 𝑋) = 𝑌)
289, 27eqtrd 2796 1 ((𝐷𝑉 ∧ (𝑋𝐷𝑌𝐷𝑋𝑌)) → ((𝑇‘{𝑋, 𝑌})‘𝑋) = 𝑌)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 399  w3a 1097   = wceq 1559  wcel 2141  wne 2956  cdif 3899  wss 3902  ifcif 4477  {csn 4579  {cpr 4581   cuni 4862   class class class wbr 5097  cfv 6516  2oc2o 8425  cen 8918  pmTrspcpmtr 19472
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-rep 5224  ax-sep 5243  ax-nul 5253  ax-pow 5319  ax-pr 5387  ax-un 7713
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-nf 1803  df-sb 2090  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3076  df-rex 3086  df-reu 3367  df-rab 3414  df-v 3455  df-sbc 3743  df-csb 3851  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4284  df-if 4478  df-pw 4554  df-sn 4580  df-pr 4582  df-op 4586  df-uni 4863  df-iun 4948  df-br 5098  df-opab 5160  df-mpt 5179  df-id 5538  df-xp 5649  df-rel 5650  df-cnv 5651  df-co 5652  df-dm 5653  df-rn 5654  df-res 5655  df-ima 5656  df-suc 6347  df-iota 6472  df-fun 6518  df-fn 6519  df-f 6520  df-f1 6521  df-fo 6522  df-f1o 6523  df-fv 6524  df-1o 8431  df-2o 8432  df-en 8922  df-pmtr 19473
This theorem is referenced by:  symggen  19501  pmtr3ncomlem1  19504  mdetralt  22656  mdetunilem7  22666  pmtrprfv2  33229  pmtridfv1  33236  psgnfzto1stlem  33241
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