Theorem cosnop 32768

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 4718	. . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≠ ∅)
3		xpco 6253	. . 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 7092	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
7	1, 5, 6	syl2anc 585	. . 3 ⊢ (𝜑 → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
8		cosnop.c	. . . 4 ⊢ (𝜑 → 𝐶 ∈ 𝑋)
9		xpsng 7092	. . . 4 ⊢ ((𝐶 ∈ 𝑋 ∧ 𝐴 ∈ 𝑉) → ({𝐶} × {𝐴}) = {⟨𝐶, 𝐴⟩})
10	8, 1, 9	syl2anc 585	. . 3 ⊢ (𝜑 → ({𝐶} × {𝐴}) = {⟨𝐶, 𝐴⟩})
11	7, 10	coeq12d 5819	. 2 ⊢ (𝜑 → (({𝐴} × {𝐵}) ∘ ({𝐶} × {𝐴})) = ({⟨𝐴, 𝐵⟩} ∘ {⟨𝐶, 𝐴⟩}))
12		xpsng 7092	. . 3 ⊢ ((𝐶 ∈ 𝑋 ∧ 𝐵 ∈ 𝑊) → ({𝐶} × {𝐵}) = {⟨𝐶, 𝐵⟩})
13	8, 5, 12	syl2anc 585	. 2 ⊢ (𝜑 → ({𝐶} × {𝐵}) = {⟨𝐶, 𝐵⟩})
14	4, 11, 13	3eqtr3d 2779	1 ⊢ (𝜑 → ({⟨𝐴, 𝐵⟩} ∘ {⟨𝐶, 𝐴⟩}) = {⟨𝐶, 𝐵⟩})

Syntax hints:   → wi 4   = wceq 1542   ∈ wcel 2114   ≠ wne 2932  ∅c0 4273  {csn 4567  ⟨cop 4573   × cxp 5629   ∘ ccom 5635

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2708  ax-sep 5231  ax-pr 5375

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3062  df-reu 3343  df-rab 3390  df-v 3431  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-nul 4274  df-if 4467  df-sn 4568  df-pr 4570  df-op 4574  df-br 5086  df-opab 5148  df-mpt 5167  df-id 5526  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-fun 6500  df-fn 6501  df-f 6502  df-f1 6503  df-fo 6504  df-f1o 6505

This theorem is referenced by:  coprprop  32772