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| Mirrors > Home > MPE Home > Th. List > xpsn | Structured version Visualization version GIF version | ||
| Description: The Cartesian product of two singletons is the singleton consisting in the associated ordered pair. (Contributed by NM, 4-Nov-2006.) |
| Ref | Expression |
|---|---|
| xpsn.1 | ⊢ 𝐴 ∈ V |
| xpsn.2 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| xpsn | ⊢ ({𝐴} × {𝐵}) = {〈𝐴, 𝐵〉} |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpsn.1 | . 2 ⊢ 𝐴 ∈ V | |
| 2 | xpsn.2 | . 2 ⊢ 𝐵 ∈ V | |
| 3 | xpsng 7138 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → ({𝐴} × {𝐵}) = {〈𝐴, 𝐵〉}) | |
| 4 | 1, 2, 3 | mp2an 705 | 1 ⊢ ({𝐴} × {𝐵}) = {〈𝐴, 𝐵〉} |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∈ wcel 2145 Vcvv 3451 {csn 4584 〈cop 4590 × cxp 5649 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-reu 3367 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 |
| This theorem is used by: dfmpt 7145 fpar 8125 mapsnconst 8913 ixpsnf1o 8959 dju1dif 10244 infdju1 10261 s1co 14977 mat1f1o 22786 txdis 23944 pt1hmeo 24118 utop2nei 24562 utop3cls 24563 imasdsf1olem 24685 ex-xp 31030 elrgspnlem4 33799 poimirlem3 38521 poimirlem4 38522 poimirlem9 38527 poimirlem28 38546 grposnOLD 38796 dib0 42201 imaf1hom 50185 setc1ocofval 50571 diag1f1olem 50610 |
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