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  • 0 posts edited
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  • 16 votes cast
Dec
22
awarded  Informed
Dec
19
accepted What can we say about the trace of this matrix?
Dec
19
comment What can we say about the trace of this matrix?
Thanks. Yes I meant $E$ and $\Lambda$. Corrected.
Dec
19
revised What can we say about the trace of this matrix?
typo
Dec
19
asked What can we say about the trace of this matrix?
Aug
18
comment Formula for the distance from a point to a straight line in $R^n$
Yes, now I see it's the same thing. Thanks.
Aug
18
awarded  Editor
Aug
18
revised Formula for the distance from a point to a straight line in $R^n$
fixed formatting
Aug
18
asked Formula for the distance from a point to a straight line in $R^n$
Jun
13
awarded  Tumbleweed
Aug
1
accepted Derivative of $f(x) = a \sum_{i=1}^x 10^{x-i}$
Aug
1
comment Derivative of $f(x) = a \sum_{i=1}^x 10^{x-i}$
@anorton Exactly.
Aug
1
comment Derivative of $f(x) = a \sum_{i=1}^x 10^{x-i}$
@GeorgeV.Williams I don't think $g(x)$ is unique. Does it have to be unique for the problem to have a solution?
Aug
1
comment Derivative of $f(x) = a \sum_{i=1}^x 10^{x-i}$
To put it in different words, I want to find $g'(x)$ where $g(x)$ is a differentiable function such that $g(x) = f(x)$ $\forall x = \{x \in \mathbb{N} | x > 1 \}$.
Aug
1
asked Derivative of $f(x) = a \sum_{i=1}^x 10^{x-i}$
Nov
4
awarded  Scholar
Nov
4
accepted How to undo linear combinations of a vector
Nov
4
awarded  Supporter
Nov
4
comment How to undo linear combinations of a vector
@GerryMyerson Sorry for using an nonstandard presentation for the problem. So, basically I have to solve a system of equation with potentially redundant equations.
Nov
4
comment How to undo linear combinations of a vector
Least squares does indeed work, but not always because $A^{T}A$ may be singular. There is no particular reason I'm using row vectors.