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Theorem cosnop 32952
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 4736 . . 3 (𝐴𝑉 → {𝐴} ≠ ∅)
3 xpco 6280 . . 3 ({𝐴} ≠ ∅ → (({𝐴} × {𝐵}) ∘ ({𝐶} × {𝐴})) = ({𝐶} × {𝐵}))
41, 2, 33syl 19 . 2 (𝜑 → (({𝐴} × {𝐵}) ∘ ({𝐶} × {𝐴})) = ({𝐶} × {𝐵}))
5 cosnop.b . . . 4 (𝜑𝐵𝑊)
6 xpsng 7125 . . . 4 ((𝐴𝑉𝐵𝑊) → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
71, 5, 6syl2anc 595 . . 3 (𝜑 → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
8 cosnop.c . . . 4 (𝜑𝐶𝑋)
9 xpsng 7125 . . . 4 ((𝐶𝑋𝐴𝑉) → ({𝐶} × {𝐴}) = {⟨𝐶, 𝐴⟩})
108, 1, 9syl2anc 595 . . 3 (𝜑 → ({𝐶} × {𝐴}) = {⟨𝐶, 𝐴⟩})
117, 10coeq12d 5841 . 2 (𝜑 → (({𝐴} × {𝐵}) ∘ ({𝐶} × {𝐴})) = ({⟨𝐴, 𝐵⟩} ∘ {⟨𝐶, 𝐴⟩}))
12 xpsng 7125 . . 3 ((𝐶𝑋𝐵𝑊) → ({𝐶} × {𝐵}) = {⟨𝐶, 𝐵⟩})
138, 5, 12syl2anc 595 . 2 (𝜑 → ({𝐶} × {𝐵}) = {⟨𝐶, 𝐵⟩})
144, 11, 133eqtr3d 2808 1 (𝜑 → ({⟨𝐴, 𝐵⟩} ∘ {⟨𝐶, 𝐴⟩}) = {⟨𝐶, 𝐵⟩})
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1563  wcel 2145  wne 2960  c0 4288  {csn 4585  cop 4591   × cxp 5650  ccom 5656
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2737  ax-sep 5251  ax-pr 5395
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-ral 3080  df-rex 3090  df-reu 3371  df-rab 3418  df-v 3459  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-nul 4289  df-if 4484  df-sn 4586  df-pr 4588  df-op 4592  df-br 5106  df-opab 5168  df-mpt 5187  df-id 5547  df-xp 5658  df-rel 5659  df-cnv 5660  df-co 5661  df-dm 5662  df-rn 5663  df-fun 6527  df-fn 6528  df-f 6529  df-f1 6530  df-fo 6531  df-f1o 6532
This theorem is referenced by:  coprprop  32956
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