Theorem cosnop 31007

Description: Composition of two ordered pair singletons with matching domain and range. (Contributed by Thierry Arnoux, 24-Sep-2023.)

Hypotheses

Ref	Expression
cosnop.a	⊢ (𝜑 → 𝐴 ∈ 𝑉)
cosnop.b	⊢ (𝜑 → 𝐵 ∈ 𝑊)
cosnop.c	⊢ (𝜑 → 𝐶 ∈ 𝑋)

Assertion

Ref	Expression
cosnop	⊢ (𝜑 → ({⟨𝐴, 𝐵⟩} ∘ {⟨𝐶, 𝐴⟩}) = {⟨𝐶, 𝐵⟩})

Proof of Theorem cosnop

Step	Hyp	Ref	Expression
1		cosnop.a	. . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
2		snnzg 4715	. . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≠ ∅)
3		xpco 6189	. . 3 ⊢ ({𝐴} ≠ ∅ → (({𝐴} × {𝐵}) ∘ ({𝐶} × {𝐴})) = ({𝐶} × {𝐵}))
4	1, 2, 3	3syl 18	. 2 ⊢ (𝜑 → (({𝐴} × {𝐵}) ∘ ({𝐶} × {𝐴})) = ({𝐶} × {𝐵}))
5		cosnop.b	. . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝑊)
6		xpsng 7005	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
7	1, 5, 6	syl2anc 583	. . 3 ⊢ (𝜑 → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
8		cosnop.c	. . . 4 ⊢ (𝜑 → 𝐶 ∈ 𝑋)
9		xpsng 7005	. . . 4 ⊢ ((𝐶 ∈ 𝑋 ∧ 𝐴 ∈ 𝑉) → ({𝐶} × {𝐴}) = {⟨𝐶, 𝐴⟩})
10	8, 1, 9	syl2anc 583	. . 3 ⊢ (𝜑 → ({𝐶} × {𝐴}) = {⟨𝐶, 𝐴⟩})
11	7, 10	coeq12d 5770	. 2 ⊢ (𝜑 → (({𝐴} × {𝐵}) ∘ ({𝐶} × {𝐴})) = ({⟨𝐴, 𝐵⟩} ∘ {⟨𝐶, 𝐴⟩}))
12		xpsng 7005	. . 3 ⊢ ((𝐶 ∈ 𝑋 ∧ 𝐵 ∈ 𝑊) → ({𝐶} × {𝐵}) = {⟨𝐶, 𝐵⟩})
13	8, 5, 12	syl2anc 583	. 2 ⊢ (𝜑 → ({𝐶} × {𝐵}) = {⟨𝐶, 𝐵⟩})
14	4, 11, 13	3eqtr3d 2787	1 ⊢ (𝜑 → ({⟨𝐴, 𝐵⟩} ∘ {⟨𝐶, 𝐴⟩}) = {⟨𝐶, 𝐵⟩})

Syntax hints:   → wi 4   = wceq 1541   ∈ wcel 2109   ≠ wne 2944  ∅c0 4261  {csn 4566  ⟨cop 4572   × cxp 5586   ∘ ccom 5592

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1801  ax-4 1815  ax-5 1916  ax-6 1974  ax-7 2014  ax-8 2111  ax-9 2119  ax-10 2140  ax-11 2157  ax-12 2174  ax-ext 2710  ax-sep 5226  ax-nul 5233  ax-pr 5355

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1544  df-fal 1554  df-ex 1786  df-nf 1790  df-sb 2071  df-mo 2541  df-eu 2570  df-clab 2717  df-cleq 2731  df-clel 2817  df-nfc 2890  df-ne 2945  df-ral 3070  df-rex 3071  df-reu 3072  df-rab 3074  df-v 3432  df-dif 3894  df-un 3896  df-in 3898  df-ss 3908  df-nul 4262  df-if 4465  df-sn 4567  df-pr 4569  df-op 4573  df-br 5079  df-opab 5141  df-mpt 5162  df-id 5488  df-xp 5594  df-rel 5595  df-cnv 5596  df-co 5597  df-dm 5598  df-rn 5599  df-fun 6432  df-fn 6433  df-f 6434  df-f1 6435  df-fo 6436  df-f1o 6437

This theorem is referenced by:  coprprop  31011