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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 6559 | . . 3 ⊢ (𝐵 ∈ 𝑊 → ({𝐴} × {𝐵}):{𝐴}⟶{𝐵}) | |
2 | 1 | adantl 482 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ({𝐴} × {𝐵}):{𝐴}⟶{𝐵}) |
3 | fsng 6891 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (({𝐴} × {𝐵}):{𝐴}⟶{𝐵} ↔ ({𝐴} × {𝐵}) = {〈𝐴, 𝐵〉})) | |
4 | 2, 3 | mpbid 233 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ({𝐴} × {𝐵}) = {〈𝐴, 𝐵〉}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1528 ∈ wcel 2105 {csn 4557 〈cop 4563 × cxp 5546 ⟶wf 6344 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-sep 5194 ax-nul 5201 ax-pr 5320 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3an 1081 df-tru 1531 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2615 df-eu 2647 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-ne 3014 df-ral 3140 df-rex 3141 df-reu 3142 df-rab 3144 df-v 3494 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-nul 4289 df-if 4464 df-sn 4558 df-pr 4560 df-op 4564 df-br 5058 df-opab 5120 df-mpt 5138 df-id 5453 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 |
This theorem is referenced by: xpprsng 6894 xpsn 6895 f1o2sn 6896 residpr 6897 fmptsn 6921 mposn 7787 repsw1 14133 s1co 14183 intopsn 17852 grp1inv 18145 psgnsn 18577 ixpsnbasval 19910 mat1dimelbas 21008 mat1dimscm 21012 mat1dimmul 21013 mat1f1o 21015 m1detdiag 21134 pt1hmeo 22342 cosnop 30357 cshw1s2 30561 nosupbnd2lem1 33112 rngosn3 35083 fmptsnxp 41301 lmod1zr 44476 |
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