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Mathbox for Alexander van der Vekens |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > 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 4400 | . . 3 ⊢ {𝐴, 𝐵} = ({𝐴} ∪ {𝐵}) | |
2 | 1 | xpeq1i 5381 | . 2 ⊢ ({𝐴, 𝐵} × {𝐶}) = (({𝐴} ∪ {𝐵}) × {𝐶}) |
3 | xpsng 6671 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑈) → ({𝐴} × {𝐶}) = {〈𝐴, 𝐶〉}) | |
4 | 3 | 3adant2 1122 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → ({𝐴} × {𝐶}) = {〈𝐴, 𝐶〉}) |
5 | xpsng 6671 | . . . . 5 ⊢ ((𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → ({𝐵} × {𝐶}) = {〈𝐵, 𝐶〉}) | |
6 | 5 | 3adant1 1121 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → ({𝐵} × {𝐶}) = {〈𝐵, 𝐶〉}) |
7 | 4, 6 | uneq12d 3990 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → (({𝐴} × {𝐶}) ∪ ({𝐵} × {𝐶})) = ({〈𝐴, 𝐶〉} ∪ {〈𝐵, 𝐶〉})) |
8 | xpundir 5418 | . . 3 ⊢ (({𝐴} ∪ {𝐵}) × {𝐶}) = (({𝐴} × {𝐶}) ∪ ({𝐵} × {𝐶})) | |
9 | df-pr 4400 | . . 3 ⊢ {〈𝐴, 𝐶〉, 〈𝐵, 𝐶〉} = ({〈𝐴, 𝐶〉} ∪ {〈𝐵, 𝐶〉}) | |
10 | 7, 8, 9 | 3eqtr4g 2838 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → (({𝐴} ∪ {𝐵}) × {𝐶}) = {〈𝐴, 𝐶〉, 〈𝐵, 𝐶〉}) |
11 | 2, 10 | syl5eq 2825 | 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 1071 = wceq 1601 ∈ wcel 2106 ∪ cun 3789 {csn 4397 {cpr 4399 〈cop 4403 × cxp 5353 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1839 ax-4 1853 ax-5 1953 ax-6 2021 ax-7 2054 ax-9 2115 ax-10 2134 ax-11 2149 ax-12 2162 ax-13 2333 ax-ext 2753 ax-sep 5017 ax-nul 5025 ax-pr 5138 |
This theorem depends on definitions: df-bi 199 df-an 387 df-or 837 df-3an 1073 df-tru 1605 df-ex 1824 df-nf 1828 df-sb 2012 df-mo 2550 df-eu 2586 df-clab 2763 df-cleq 2769 df-clel 2773 df-nfc 2920 df-ne 2969 df-ral 3094 df-rex 3095 df-reu 3096 df-rab 3098 df-v 3399 df-dif 3794 df-un 3796 df-in 3798 df-ss 3805 df-nul 4141 df-if 4307 df-sn 4398 df-pr 4400 df-op 4404 df-br 4887 df-opab 4949 df-mpt 4966 df-id 5261 df-xp 5361 df-rel 5362 df-cnv 5363 df-co 5364 df-dm 5365 df-rn 5366 df-fun 6137 df-fn 6138 df-f 6139 df-f1 6140 df-fo 6141 df-f1o 6142 |
This theorem is referenced by: zlmodzxz0 43142 ehl2eudisval0 43454 |
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