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seen Dec 10 at 20:01

Oct
17
comment Finding unknown matrices in a set of simultaneous matrix equations
I think $X$ should be $n$x$p$
Oct
12
awarded  Nice Answer
Oct
11
revised Why get the sum of squares instead of the sum of absolute values?
added 3 characters in body
Oct
11
answered Why get the sum of squares instead of the sum of absolute values?
Sep
21
awarded  Yearling
Aug
18
comment Integral notation
@drhab Thanks. So it has nothing to do with the $dy$?
Aug
18
asked Integral notation
Jul
30
comment Types of definitions
@GitGud In real life, it seems to me that there is a difference between defining what an object is by describing the object itself and defining what an object is by describing how it is generated. I just don't know if this distinction makes sense in math.
Jul
30
revised Types of definitions
added 27 characters in body
Jul
30
comment Types of definitions
Hmm... perhaps this is not the right SE, since in math definitions are always "generative" to some extent?
Jul
30
revised Types of definitions
added 247 characters in body
Jul
30
comment Types of definitions
Ok I think I should maybe add a more abstract example, since my question is not about the specifics.
Jul
30
asked Types of definitions
Jul
2
awarded  Curious
Jun
1
comment How to find closest positive definite matrix of non-symmetric matrix
Thanks Michael. Can you comment on whether anything changes (e.g. is it simpler?) if we know that A is real symmetric?
May
7
comment Composition of non-monotonic convex function
Thanks. See my clarification in the question on what I am trying to do.
May
7
revised Composition of non-monotonic convex function
added 258 characters in body
May
7
comment Composition of non-monotonic convex function
@MichaelGrant I have a convex function $h$ which I know and I want to let an external "user" supply $g$. I do not know what $g$ will be but I want to be able to provide guidelines on how to choose $g$ such that $f$ will result in a convex function.
May
7
asked Composition of non-monotonic convex function
May
6
revised Coordinatewise vector operation notation
added 23 characters in body