e/Approximation in algebraic groups

Information
has gloss	eng: In mathematics, strong approximation in linear algebraic groups is an important arithmetic property of matrix groups. In rough terms, it explains to what extent there can be an extension of the Chinese remainder theorem to various kinds of matrices. For example, for orthogonal matrices, there cannot be such an extension and there is a theory explaining why there is, and where the problem lies (it is in the spin groups).
lexicalization	eng: Approximation in algebraic groups
instance of	e/Algebraic group