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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