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| Mirrors > Home > MPE Home > Th. List > xpsng | Structured version Visualization version GIF version | ||
| Description: The Cartesian product of two singletons is the singleton consisting in the associated ordered pair. (Contributed by Mario Carneiro, 30-Apr-2015.) |
| Ref | Expression |
|---|---|
| xpsng | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ({𝐴} × {𝐵}) = {〈𝐴, 𝐵〉}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fconstg 6769 | . . 3 ⊢ (𝐵 ∈ 𝑊 → ({𝐴} × {𝐵}):{𝐴}⟶{𝐵}) | |
| 2 | 1 | adantl 487 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ({𝐴} × {𝐵}):{𝐴}⟶{𝐵}) |
| 3 | fsng 7138 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (({𝐴} × {𝐵}):{𝐴}⟶{𝐵} ↔ ({𝐴} × {𝐵}) = {〈𝐴, 𝐵〉})) | |
| 4 | 2, 3 | mpbid 235 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ({𝐴} × {𝐵}) = {〈𝐴, 𝐵〉}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 {csn 4584 〈cop 4590 × cxp 5649 ⟶wf 6534 |
| 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 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 |
| This theorem is used by: xpsn 7141 xpprsng 7142 xpsnprg 7143 xpsntpg 7144 f1o2sn 7145 residpr 7146 fmptsn 7172 f1ofvswap 7314 mposn 8114 repsw1 14934 s1co 14984 intopsn 18832 grp1inv 19258 psgnsn 19734 ixpsnbasval 21483 mat1dimelbas 22786 mat1dimscm 22790 mat1dimmul 22791 mat1f1o 22793 m1detdiag 22912 pt1hmeo 24125 nosupbnd2lem1 28072 cosnop 33288 cshw1s2 33521 selvply1rhmlem2 34153 vieta 34212 rngosn3 38858 fmptsnxp 46183 lmod1zr 49604 cosn 49943 termcfuncval 50639 diag1f1olem 50640 diag2f1olem 50643 |
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