Math 2331 { Linear Algebra
1 To show that H is a subspace of a vector space, use Theorem 1. 2 To show that a set is not a subspace of a vector space, provide a speci c example showing that at least one of the axioms a, b or c (from the de nition of a subspace) is violated. Jiwen He, University of Houston Math 2331, Linear Algebra 18 / 21
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