| 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 4726 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≠ ∅) | |
| 3 | xpco 6241 | . . 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 7078 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ({𝐴} × {𝐵}) = {〈𝐴, 𝐵〉}) | |
| 7 | 1, 5, 6 | syl2anc 584 | . . 3 ⊢ (𝜑 → ({𝐴} × {𝐵}) = {〈𝐴, 𝐵〉}) |
| 8 | cosnop.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ 𝑋) | |
| 9 | xpsng 7078 | . . . 4 ⊢ ((𝐶 ∈ 𝑋 ∧ 𝐴 ∈ 𝑉) → ({𝐶} × {𝐴}) = {〈𝐶, 𝐴〉}) | |
| 10 | 8, 1, 9 | syl2anc 584 | . . 3 ⊢ (𝜑 → ({𝐶} × {𝐴}) = {〈𝐶, 𝐴〉}) |
| 11 | 7, 10 | coeq12d 5808 | . 2 ⊢ (𝜑 → (({𝐴} × {𝐵}) ∘ ({𝐶} × {𝐴})) = ({〈𝐴, 𝐵〉} ∘ {〈𝐶, 𝐴〉})) |
| 12 | xpsng 7078 | . . 3 ⊢ ((𝐶 ∈ 𝑋 ∧ 𝐵 ∈ 𝑊) → ({𝐶} × {𝐵}) = {〈𝐶, 𝐵〉}) | |
| 13 | 8, 5, 12 | syl2anc 584 | . 2 ⊢ (𝜑 → ({𝐶} × {𝐵}) = {〈𝐶, 𝐵〉}) |
| 14 | 4, 11, 13 | 3eqtr3d 2776 | 1 ⊢ (𝜑 → ({〈𝐴, 𝐵〉} ∘ {〈𝐶, 𝐴〉}) = {〈𝐶, 𝐵〉}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 ≠ wne 2929 ∅c0 4282 {csn 4575 〈cop 4581 × cxp 5617 ∘ ccom 5623 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-sep 5236 ax-nul 5246 ax-pr 5372 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-ral 3049 df-rex 3058 df-reu 3348 df-rab 3397 df-v 3439 df-dif 3901 df-un 3903 df-ss 3915 df-nul 4283 df-if 4475 df-sn 4576 df-pr 4578 df-op 4582 df-br 5094 df-opab 5156 df-mpt 5175 df-id 5514 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 |
| This theorem is referenced by: coprprop 32684 |
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