Jodles
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 Dec26 comment If two sets (including A) are mutually exclusive, then A is the union of the sets. Thanks! I was looking at it in the wrong "direction"! Dec26 accepted If two sets (including A) are mutually exclusive, then A is the union of the sets. Dec26 asked If two sets (including A) are mutually exclusive, then A is the union of the sets. Dec15 awarded Notable Question Nov20 awarded Popular Question Jul2 awarded Curious Aug15 comment A basic doubt on linear dependence of vectors I think you mean "since t is not in the subspace spanned by u, v and w." May17 awarded Caucus May8 awarded Popular Question Aug20 awarded Yearling Dec7 accepted Why is $\mathbf{\hat{x}} = \sum_{j=2}^n (\mathbf{x}\cdot\mathbf{u}_j)\mathbf{u}_j = \mathbf{x} - (\mathbf{x}\cdot \mathbf{u})\mathbf{u}$? Dec7 comment Why is $\mathbf{\hat{x}} = \sum_{j=2}^n (\mathbf{x}\cdot\mathbf{u}_j)\mathbf{u}_j = \mathbf{x} - (\mathbf{x}\cdot \mathbf{u})\mathbf{u}$? Thanks, David! That's what I needed! Weird how it's so obvious after someone told you where to look... Dec7 asked Why is $\mathbf{\hat{x}} = \sum_{j=2}^n (\mathbf{x}\cdot\mathbf{u}_j)\mathbf{u}_j = \mathbf{x} - (\mathbf{x}\cdot \mathbf{u})\mathbf{u}$? Dec7 accepted Finding an orthogonal basis for an inner product space $\mathbf{P}_2$ Dec6 asked Finding an orthogonal basis for an inner product space $\mathbf{P}_2$ Oct21 accepted Different results for row reduction in Matlab Oct20 comment Different results for row reduction in Matlab @J.M. I am using MATLAB 7.11.0 (R2010b). Oct20 revised Different results for row reduction in Matlab Added screenshot from MATLAB Oct20 comment Different results for row reduction in Matlab @J.M. and Agusti, I think I might have narrowed it down to a rounding error, causing the top and bottom row to be slightly different (but not shown due to lack of decimals shown in Matlab). As you are both more experienced here than me, do you think I should answer my own post or delete it? Thank you! Oct20 revised Different results for row reduction in Matlab Possible solution