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Feb
4
reviewed Leave Open An inequality with a sum of integrals
Feb
4
reviewed Approve extremal-graph-theory tag wiki excerpt
Feb
4
comment To determine if a 2 variable symmetric function is addition formula of one variable function or not?
Sorry, didn't you forget to define what a kernel of an addition formula is?
Feb
4
answered Discrepancy of elements in minimal members of a union-closed set
Feb
4
reviewed Approve topological-graph-theory tag wiki excerpt
Feb
4
reviewed Close Can a semigroup be defined on a Banach algebra?
Feb
3
answered approximation of products of polynomials
Feb
3
reviewed Close Minimum size set of partition-of-unity smooth functions with bounded support
Feb
3
reviewed Close Asymptotic behavior of a function
Feb
3
answered How often can subsets of a universe intersect exactly once?
Jan
25
comment “L-Shaped Positions” in Chomp
Could you please explain what Ordinal chomp is?
Jan
19
reviewed Approve Infinitely many $k$ such that $[a_k,a_{k+1}]>ck^2$
Jan
19
answered Infinitely many $k$ such that $[a_k,a_{k+1}]>ck^2$
Jan
15
reviewed No Action Needed Lenstra's integer programming algorithm: Finding a lattice point “near the center”
Jan
15
reviewed Close Estimate $\left|\sum_{n,m}a_n \bar b_m\right|\leq C \left(\sum_n|a_n|^2\right)^{1/2} \left(\sum_n|b_n|^2\right)^{1/2}$
Jan
15
comment Is there a Havel-Hakimi for geometric graphs?
Your link describes different type of geometric graphs. Do you mean plane graph with straight edges?
Jan
15
answered Why is the doubling dimension of any net of a metric space at most half of that of the metric space?
Jan
15
comment Why is the doubling dimension of any net of a metric space at most half of that of the metric space?
THe title is quite misleading: not "half of" but "at most twice".
Jan
14
answered A strengthening of Frankl's union-closed sets conjecture?
Jan
13
comment Multiplicatively closed subsets of $\mathbb{C}^{n \times n}$
Agreeing with Jason in general, I would still mention that one can describe subalgebras of $2\times 2$ matrices. Any 2-dimensional one has the form $\mathbb C[A]$ for some matrix $A$, and is generated so by almost any its matrix. Next, it sems that any 3-dimensional subalgebra is the set of matrces sharing a common eigenvector.