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Mirrors > Home > MPE Home > Th. List > xpprsng | Structured version Visualization version GIF version |
Description: The Cartesian product of an unordered pair and a singleton. (Contributed by AV, 20-May-2019.) |
Ref | Expression |
---|---|
xpprsng | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → ({𝐴, 𝐵} × {𝐶}) = {〈𝐴, 𝐶〉, 〈𝐵, 𝐶〉}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-pr 4519 | . . 3 ⊢ {𝐴, 𝐵} = ({𝐴} ∪ {𝐵}) | |
2 | 1 | xpeq1i 5551 | . 2 ⊢ ({𝐴, 𝐵} × {𝐶}) = (({𝐴} ∪ {𝐵}) × {𝐶}) |
3 | xpsng 6911 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑈) → ({𝐴} × {𝐶}) = {〈𝐴, 𝐶〉}) | |
4 | 3 | 3adant2 1132 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → ({𝐴} × {𝐶}) = {〈𝐴, 𝐶〉}) |
5 | xpsng 6911 | . . . . 5 ⊢ ((𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → ({𝐵} × {𝐶}) = {〈𝐵, 𝐶〉}) | |
6 | 5 | 3adant1 1131 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → ({𝐵} × {𝐶}) = {〈𝐵, 𝐶〉}) |
7 | 4, 6 | uneq12d 4054 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → (({𝐴} × {𝐶}) ∪ ({𝐵} × {𝐶})) = ({〈𝐴, 𝐶〉} ∪ {〈𝐵, 𝐶〉})) |
8 | xpundir 5592 | . . 3 ⊢ (({𝐴} ∪ {𝐵}) × {𝐶}) = (({𝐴} × {𝐶}) ∪ ({𝐵} × {𝐶})) | |
9 | df-pr 4519 | . . 3 ⊢ {〈𝐴, 𝐶〉, 〈𝐵, 𝐶〉} = ({〈𝐴, 𝐶〉} ∪ {〈𝐵, 𝐶〉}) | |
10 | 7, 8, 9 | 3eqtr4g 2798 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → (({𝐴} ∪ {𝐵}) × {𝐶}) = {〈𝐴, 𝐶〉, 〈𝐵, 𝐶〉}) |
11 | 2, 10 | syl5eq 2785 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → ({𝐴, 𝐵} × {𝐶}) = {〈𝐴, 𝐶〉, 〈𝐵, 𝐶〉}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1088 = wceq 1542 ∈ wcel 2114 ∪ cun 3841 {csn 4516 {cpr 4518 〈cop 4522 × cxp 5523 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2710 ax-sep 5167 ax-nul 5174 ax-pr 5296 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2540 df-eu 2570 df-clab 2717 df-cleq 2730 df-clel 2811 df-nfc 2881 df-ne 2935 df-ral 3058 df-rex 3059 df-reu 3060 df-v 3400 df-dif 3846 df-un 3848 df-in 3850 df-ss 3860 df-nul 4212 df-if 4415 df-sn 4517 df-pr 4519 df-op 4523 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5429 df-xp 5531 df-rel 5532 df-cnv 5533 df-co 5534 df-dm 5535 df-rn 5536 df-fun 6341 df-fn 6342 df-f 6343 df-f1 6344 df-fo 6345 df-f1o 6346 |
This theorem is referenced by: linds2eq 31147 zlmodzxz0 45226 ehl2eudisval0 45605 |
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