Today I Learned

Some of the things I've learned every day since Oct 10, 2016

34: Orthonormal Subsets

An orthonormal subset S of an inner product space V is a subspace for which all vectors are mutually orthogonal (\forall x \neq y \in S, \langle x, y \rangle = 0) and are unit vectors (\forall x \in S, ||x|| = 1).

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