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If you have any good math exercises to share feel free to contribute them on http://exwiki.org


Dec
8
comment Linear programming: expressing the fact that precisely $k$ variables are nonzero
@Amr It can be assumed the variables are non-negative reals that can be (if needed) bounded.
Dec
8
comment Linear programming: expressing the fact that precisely $k$ variables are nonzero
@Amr The binaries are reals. Can a linear program actually have binary variables?
Dec
8
asked Linear programming: expressing the fact that precisely $k$ variables are nonzero
Dec
8
comment Good software for linear/integer programming
Yes actually sage uses (by default) GLPTK and can be tweaked to run gurobi as well.
Dec
7
accepted Good software for linear/integer programming
Dec
6
asked Good software for linear/integer programming
Dec
6
comment Triangle free graphs with large chromatic number
You probably already know this but for every $g \geq 3$ and $k \geq 1$ there are graphs with girth $g$ and chromatic number larger than $k$. This is somehow easy to prove using the probabilistic method.
Nov
29
revised Cayley graphs on small Dihedral and Cyclic group
deleted 9 characters in body
Nov
29
answered Cayley graphs on small Dihedral and Cyclic group
Nov
29
comment The $h-$th power of every element in a finite group of order $h$ is the identity element of the group
Sure but usually if something has a name as known as this one then you don't cite the result. In a way the name by itself is the citation
Nov
29
comment The $h-$th power of every element in a finite group of order $h$ is the identity element of the group
Why exactly do you need to cite this theorem? One reason a theorem has a name is so that you can reference to it :)
Nov
29
answered The $h-$th power of every element in a finite group of order $h$ is the identity element of the group
Nov
28
accepted Finding polynomials with a specific property
Nov
28
asked Question about computability of true/provable formulas
Nov
28
comment Finding polynomials with a specific property
Thank you for this extensive answer. I will accept it as soon as I go through it more thoroughly!
Nov
27
asked Finding polynomials with a specific property
Nov
26
accepted Diagonal of a convex polygon such that the obtained cuts have simmilar areas
Nov
26
comment Diagonal of a convex polygon such that the obtained cuts have simmilar areas
Thank you for the answer. Could you please explain it a bit further? I don't quite understand why this algorithm works properly and what is its key idea.
Nov
26
asked Diagonal of a convex polygon such that the obtained cuts have simmilar areas
Nov
25
revised Is there a term for this kind of “partition”?
edited tags