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Nov
16
revised Is the Feichtinger's algebra $(S_0(\mathbb{R^d}),||\cdot||_{S_0})$ reflexive?
latexed a bit
Nov
16
comment Is the Feichtinger's algebra $(S_0(\mathbb{R^d}),||\cdot||_{S_0})$ reflexive?
Welcome to MO! Great to have you here - there are plenty of unanswered questions around for which the posters would be glad if you could take a look (see, e.g. the questions appearing on the right in a browser or try the search terms "Besov space", "Modulation space" or even "Feichtinger"!)
Nov
9
comment Is it possible to pursue a career in mathematics only working within a small subset of the subject?
Well, this is not precisely a place to talk about something… Put differently: Your question is much too broad, one needs more detail about you and finally, all answers would be only helpful to you and nobody else.
Nov
6
comment Lower bound on the value $\textbf{1}^Tx$ such as $Ax\geq b$
After your edit (i.e. with unknown $A$) it looks like a quadratic programming problem (for the unknowns $A$ and $x$). Depending on the size, if could well be solvable, even with integer constraints for the entries of $A$. You could try SCIP: scip.zib.de.
Nov
3
reviewed Close What does Kqn means here?
Nov
3
reviewed Approve What does Kqn means here?
Nov
3
reviewed Approve What does Kqn means here?
Oct
27
answered Better alternative to solve quadratic programming for large matrices
Oct
26
awarded  Pundit
Oct
26
comment Hahn-Banach theorem with convex majorant
Wow, you know more than 100 books on functional analysis!
Oct
15
comment Asking for Advices for Choosing a Ph.D thesis problem (in PDE area)
I took the liberty to go over the text and edit out some typos. I hope that I did not alter the meaning but anyway, feel free to rollback.
Oct
15
revised Asking for Advices for Choosing a Ph.D thesis problem (in PDE area)
Tried to iron out some language issues and typos…
Oct
14
reviewed Leave Open The property reservation conditions in the functional iteration process
Oct
14
reviewed Close Algorithm for finding eigenfunctions
Oct
14
reviewed Close Can a (non-measurable) autonomous flow have a non-trivial periodic orbit without a minimal period?
Oct
14
comment Can a (non-measurable) autonomous flow have a non-trivial periodic orbit without a minimal period?
If, e.g. $t_n=1/n$ then the condition does imply anything about $f^{\pi}$, right?
Oct
14
reviewed Leave Open Relaxation of non-convex QCQP with one quadratic and one linear constraint
Oct
14
comment Finding closest set of K disjoint hyperspheres to a point in $\mathbb{R}^n$ with uniform radius
I must miss something here: In $\mathbb{R}^n$, we have $N$ overlapping hyperspheres all with the same radius. Given a point $p$ in $\mathbb{R}^n$, the objective is to find the $K$ hyperspheres whose centers are the closest to $p$ under the Euclidean metric. If $p$ is given and the hyperspheres are given you have all distances you want…
Oct
13
revised Questions concerning convergence rate of Iterated Projections
Some point about remotest set control…
Oct
13
answered Questions concerning convergence rate of Iterated Projections