Jodles
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 Feb 16 comment Optimisation with matrix-vector constraint @user251257 Thanks a lot! You can probably put that as an answer? Also I'd be interested to know what resources / books cover this as I'm struggling to find anything but the typical treatment of Lagrangians... (or even just, why is this true?) Feb 15 asked Optimisation with matrix-vector constraint Oct 29 asked Does maximising modular functions carry the same properties as maximising submodular functions? Aug 9 awarded Popular Question Dec 26 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"! Dec 26 accepted If two sets (including A) are mutually exclusive, then A is the union of the sets. Dec 26 asked If two sets (including A) are mutually exclusive, then A is the union of the sets. Dec 15 awarded Notable Question Nov 20 awarded Popular Question Jul 2 awarded Curious Aug 15 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." May 17 awarded Caucus May 8 awarded Popular Question Aug 20 awarded Yearling Dec 7 accepted Why is $\mathbf{\hat{x}} = \sum_{j=2}^n (\mathbf{x}\cdot\mathbf{u}_j)\mathbf{u}_j = \mathbf{x} - (\mathbf{x}\cdot \mathbf{u})\mathbf{u}$? Dec 7 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... Dec 7 asked Why is $\mathbf{\hat{x}} = \sum_{j=2}^n (\mathbf{x}\cdot\mathbf{u}_j)\mathbf{u}_j = \mathbf{x} - (\mathbf{x}\cdot \mathbf{u})\mathbf{u}$? Dec 7 accepted Finding an orthogonal basis for an inner product space $\mathbf{P}_2$ Dec 6 asked Finding an orthogonal basis for an inner product space $\mathbf{P}_2$ Oct 21 accepted Different results for row reduction in Matlab