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Mathbox for Thierry Arnoux |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > cosnop | Structured version Visualization version GIF version |
Description: Composition of two ordered pair singletons with matching domain and range. (Contributed by Thierry Arnoux, 24-Sep-2023.) |
Ref | Expression |
---|---|
cosnop.a | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
cosnop.b | ⊢ (𝜑 → 𝐵 ∈ 𝑊) |
cosnop.c | ⊢ (𝜑 → 𝐶 ∈ 𝑋) |
Ref | Expression |
---|---|
cosnop | ⊢ (𝜑 → ({⟨𝐴, 𝐵⟩} ∘ {⟨𝐶, 𝐴⟩}) = {⟨𝐶, 𝐵⟩}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cosnop.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
2 | snnzg 4779 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≠ ∅) | |
3 | xpco 6289 | . . 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 7137 | . . . 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 7137 | . . . 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 5865 | . 2 ⊢ (𝜑 → (({𝐴} × {𝐵}) ∘ ({𝐶} × {𝐴})) = ({⟨𝐴, 𝐵⟩} ∘ {⟨𝐶, 𝐴⟩})) |
12 | xpsng 7137 | . . 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 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 |
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