Jodles
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 Dec26 asked If two sets (including A) are mutually exclusive, then A is the union of the sets. Dec7 asked Why is $\mathbf{\hat{x}} = \sum_{j=2}^n (\mathbf{x}\cdot\mathbf{u}_j)\mathbf{u}_j = \mathbf{x} - (\mathbf{x}\cdot \mathbf{u})\mathbf{u}$? Dec6 asked Finding an orthogonal basis for an inner product space $\mathbf{P}_2$ Oct20 asked Different results for row reduction in Matlab Oct8 asked Showing that $\{ 1, \cos t, \cos^2 t, \dots, \cos^6 t \}$ is a linearly independent set Oct8 asked Showing that a one-to-one linear transformation maps a linearly independent set onto a linearly independent set Sep4 asked Showing that $\mathbf{u}=\mathbf{0}$ for $c\mathbf{u}=\mathbf{0}$, $c$ nonzero Aug31 asked Meaning of, and how to verify, a vector space *over* $\mathbb{R}$ Aug30 asked Help with the proof of the characterization of linearly dependent sets Aug29 asked Criteria for a subspace and why they are not satisfied in this particular case Aug23 asked Why is $\vec{x}$ in $A\vec{x}=\vec{b}$ in $\mathbb{R}^n$, when $A$ is an m x n matrix and $\vec{b}$ is in $\mathbb{R}^m$?