| http://www.w3.org/ns/prov#value | - The tutor explains that a common way to prove that a subset S of a vector space V is a subspace of V (S<V) is to use the Subspace Test, namely prove that 0???S, and, af+bg???S, ???f, g???S and scalars a and b, i.e. addition and scalar multiplication are closed in S. Two applications of the Test for two subsets of Mn(R), the set of nxn matrices, follow.
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