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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 7141 | . 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 1569 ∈ wcel 2144 Vcvv 3450 {csn 4584 〈cop 4834 × cxp 5648 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 |
| This theorem is used by: dfmpt 7148 fpar 8130 mapsnconst 8924 ixpsnf1o 8970 dju1dif 10255 infdju1 10272 s1co 14989 mat1f1o 22799 txdis 23957 pt1hmeo 24131 utop2nei 24575 utop3cls 24576 imasdsf1olem 24698 ex-xp 31043 elrgspnlem4 33853 poimirlem3 38635 poimirlem4 38636 poimirlem9 38641 poimirlem28 38660 grposnOLD 38910 dib0 42315 imaf1hom 50318 setc1ocofval 50723 diag1f1olem 50762 |
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