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| Weak approximation theorem ： ウィキペディア英語版 |
Approximation in algebraic groups
In algebraic group theory, approximation theorems are an extension of the Chinese remainder theorem to algebraic groups ''G'' over global fields ''k''.
==Use==
They give conditions for the group ''G''(''k'') to be dense in a restricted direct product of groups of the form ''G''(''k''''s'') for ''k''''s'' a completion of ''k'' at the place ''s''. In weak approximation theorems the product is over a finite set of places ''s'', while in strong approximation theorems the product is over all but a finite set of places.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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