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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 7172 | . 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 2147 Vcvv 3454 {csn 4588 〈cop 4840 × cxp 5656 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-pr 5398 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4841 df-br 5109 df-opab 5174 df-mpt 5193 df-id 5553 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 |
| This theorem is used by: dfmpt 7179 fpar 8164 mapsnconst 8958 ixpsnf1o 9004 dju1dif 10290 infdju1 10307 s1co 15026 mat1f1o 22848 txdis 24006 pt1hmeo 24180 utop2nei 24624 utop3cls 24625 imasdsf1olem 24747 ex-xp 31094 elrgspnlem4 33905 poimirlem3 38809 poimirlem4 38810 poimirlem9 38815 poimirlem28 38834 grposnOLD 39082 dib0 42487 imaf1hom 50555 setc1ocofval 50960 diag1f1olem 50999 |
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