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Theorem ovtposg 6122
Description: The transposition swaps the arguments in a two-argument function. When 𝐹 is a matrix, which is to say a function from ( 1 ... m ) × ( 1 ... n ) to the reals or some ring, tpos 𝐹 is the transposition of 𝐹, which is where the name comes from. (Contributed by Mario Carneiro, 10-Sep-2015.)
Assertion
Ref Expression
ovtposg ((𝐴𝑉𝐵𝑊) → (𝐴tpos 𝐹𝐵) = (𝐵𝐹𝐴))

Proof of Theorem ovtposg
Dummy variable 𝑦 is distinct from all other variables.
StepHypRef Expression
1 vex 2661 . . . . 5 𝑦 ∈ V
2 brtposg 6117 . . . . 5 ((𝐴𝑉𝐵𝑊𝑦 ∈ V) → (⟨𝐴, 𝐵⟩tpos 𝐹𝑦 ↔ ⟨𝐵, 𝐴𝐹𝑦))
31, 2mp3an3 1287 . . . 4 ((𝐴𝑉𝐵𝑊) → (⟨𝐴, 𝐵⟩tpos 𝐹𝑦 ↔ ⟨𝐵, 𝐴𝐹𝑦))
43iotabidv 5077 . . 3 ((𝐴𝑉𝐵𝑊) → (℩𝑦𝐴, 𝐵⟩tpos 𝐹𝑦) = (℩𝑦𝐵, 𝐴𝐹𝑦))
5 df-fv 5099 . . 3 (tpos 𝐹‘⟨𝐴, 𝐵⟩) = (℩𝑦𝐴, 𝐵⟩tpos 𝐹𝑦)
6 df-fv 5099 . . 3 (𝐹‘⟨𝐵, 𝐴⟩) = (℩𝑦𝐵, 𝐴𝐹𝑦)
74, 5, 63eqtr4g 2173 . 2 ((𝐴𝑉𝐵𝑊) → (tpos 𝐹‘⟨𝐴, 𝐵⟩) = (𝐹‘⟨𝐵, 𝐴⟩))
8 df-ov 5743 . 2 (𝐴tpos 𝐹𝐵) = (tpos 𝐹‘⟨𝐴, 𝐵⟩)
9 df-ov 5743 . 2 (𝐵𝐹𝐴) = (𝐹‘⟨𝐵, 𝐴⟩)
107, 8, 93eqtr4g 2173 1 ((𝐴𝑉𝐵𝑊) → (𝐴tpos 𝐹𝐵) = (𝐵𝐹𝐴))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 103  wb 104   = wceq 1314  wcel 1463  Vcvv 2658  cop 3498   class class class wbr 3897  cio 5054  cfv 5091  (class class class)co 5740  tpos ctpos 6107
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 681  ax-5 1406  ax-7 1407  ax-gen 1408  ax-ie1 1452  ax-ie2 1453  ax-8 1465  ax-10 1466  ax-11 1467  ax-i12 1468  ax-bndl 1469  ax-4 1470  ax-13 1474  ax-14 1475  ax-17 1489  ax-i9 1493  ax-ial 1497  ax-i5r 1498  ax-ext 2097  ax-sep 4014  ax-pow 4066  ax-pr 4099  ax-un 4323
This theorem depends on definitions:  df-bi 116  df-3an 947  df-tru 1317  df-nf 1420  df-sb 1719  df-eu 1978  df-mo 1979  df-clab 2102  df-cleq 2108  df-clel 2111  df-nfc 2245  df-ral 2396  df-rex 2397  df-rab 2400  df-v 2660  df-sbc 2881  df-un 3043  df-in 3045  df-ss 3052  df-pw 3480  df-sn 3501  df-pr 3502  df-op 3504  df-uni 3705  df-br 3898  df-opab 3958  df-mpt 3959  df-id 4183  df-xp 4513  df-rel 4514  df-cnv 4515  df-co 4516  df-dm 4517  df-rn 4518  df-res 4519  df-ima 4520  df-iota 5056  df-fun 5093  df-fn 5094  df-fv 5099  df-ov 5743  df-tpos 6108
This theorem is referenced by:  tpossym  6139
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