Users' Mathboxes Mathbox for Thierry Arnoux < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  cosnop Structured version   Visualization version   GIF version

Theorem cosnop 31917
Description: Composition of two ordered pair singletons with matching domain and range. (Contributed by Thierry Arnoux, 24-Sep-2023.)
Hypotheses
Ref Expression
cosnop.a (𝜑𝐴𝑉)
cosnop.b (𝜑𝐵𝑊)
cosnop.c (𝜑𝐶𝑋)
Assertion
Ref Expression
cosnop (𝜑 → ({⟨𝐴, 𝐵⟩} ∘ {⟨𝐶, 𝐴⟩}) = {⟨𝐶, 𝐵⟩})

Proof of Theorem cosnop
StepHypRef Expression
1 cosnop.a . . 3 (𝜑𝐴𝑉)
2 snnzg 4779 . . 3 (𝐴𝑉 → {𝐴} ≠ ∅)
3 xpco 6289 . . 3 ({𝐴} ≠ ∅ → (({𝐴} × {𝐵}) ∘ ({𝐶} × {𝐴})) = ({𝐶} × {𝐵}))
41, 2, 33syl 18 . 2 (𝜑 → (({𝐴} × {𝐵}) ∘ ({𝐶} × {𝐴})) = ({𝐶} × {𝐵}))
5 cosnop.b . . . 4 (𝜑𝐵𝑊)
6 xpsng 7137 . . . 4 ((𝐴𝑉𝐵𝑊) → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
71, 5, 6syl2anc 585 . . 3 (𝜑 → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
8 cosnop.c . . . 4 (𝜑𝐶𝑋)
9 xpsng 7137 . . . 4 ((𝐶𝑋𝐴𝑉) → ({𝐶} × {𝐴}) = {⟨𝐶, 𝐴⟩})
108, 1, 9syl2anc 585 . . 3 (𝜑 → ({𝐶} × {𝐴}) = {⟨𝐶, 𝐴⟩})
117, 10coeq12d 5865 . 2 (𝜑 → (({𝐴} × {𝐵}) ∘ ({𝐶} × {𝐴})) = ({⟨𝐴, 𝐵⟩} ∘ {⟨𝐶, 𝐴⟩}))
12 xpsng 7137 . . 3 ((𝐶𝑋𝐵𝑊) → ({𝐶} × {𝐵}) = {⟨𝐶, 𝐵⟩})
138, 5, 12syl2anc 585 . 2 (𝜑 → ({𝐶} × {𝐵}) = {⟨𝐶, 𝐵⟩})
144, 11, 133eqtr3d 2781 1 (𝜑 → ({⟨𝐴, 𝐵⟩} ∘ {⟨𝐶, 𝐴⟩}) = {⟨𝐶, 𝐵⟩})
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1542  wcel 2107  wne 2941  c0 4323  {csn 4629  cop 4635   × cxp 5675  ccom 5681
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2155  ax-12 2172  ax-ext 2704  ax-sep 5300  ax-nul 5307  ax-pr 5428
This theorem depends on definitions:  df-bi 206  df-an 398  df-or 847  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1783  df-nf 1787  df-sb 2069  df-mo 2535  df-eu 2564  df-clab 2711  df-cleq 2725  df-clel 2811  df-nfc 2886  df-ne 2942  df-ral 3063  df-rex 3072  df-reu 3378  df-rab 3434  df-v 3477  df-dif 3952  df-un 3954  df-in 3956  df-ss 3966  df-nul 4324  df-if 4530  df-sn 4630  df-pr 4632  df-op 4636  df-br 5150  df-opab 5212  df-mpt 5233  df-id 5575  df-xp 5683  df-rel 5684  df-cnv 5685  df-co 5686  df-dm 5687  df-rn 5688  df-fun 6546  df-fn 6547  df-f 6548  df-f1 6549  df-fo 6550  df-f1o 6551
This theorem is referenced by:  coprprop  31921
  Copyright terms: Public domain W3C validator