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Connor
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comment
separator and vertex-connectivity
I think after removing any two vertices of the join, the remaining is still connected? So it is 2-connected?
asked
separator and vertex-connectivity
revised
Combine two types of permutations in a Young diagram?
added 54 characters in body
revised
Combine two types of permutations in a Young diagram?
Added a more concrete question
comment
Combine two types of permutations in a Young diagram?
I see. Actually, there the sum is the same for every cell. I edited it and added a concrete goal.
revised
Combine two types of permutations in a Young diagram?
Added a more concrete question
awarded
 Custodian
reviewed
Approve
Combine two types of permutations in a Young diagram?
comment
Combine two types of permutations in a Young diagram?
Yes. Any non-trivial upper bound would be interesting.
comment
Combine two types of permutations in a Young diagram?
Yes, what you said sounds more concrete: let $t$ be a vector such that $t_i$ is the maximum sum of the two coordinates of a cell in row $i$. And the target is to minimize the $\ell_1$-norm of the vector $t$.
asked
Combine two types of permutations in a Young diagram?
asked
Construct a maximum matching from a minimum vertex cover in bipartite graph?
comment
Number of points covered by $2n$ hyperplanes in $\mathbf{F}_p^n$
Those $s_i,t_i$ are non-zero, which makes the probability not $(1-p^{-1})^n$.
asked
Number of points covered by $2n$ hyperplanes in $\mathbf{F}_p^n$
awarded
 Commentator
revised
When Alexander dual of a simplicial complex is a matroid?
added 46 characters in body
asked
When Alexander dual of a simplicial complex is a matroid?
revised
Connectivity of a matroid is at least its rank?
added 46 characters in body
comment
Connectivity of a matroid is at least its rank?
When $X$ is a simplex, $\eta(X)$ is defined to be infinity. So the bound still holds.
revised
Connectivity of a matroid is at least its rank?
added 46 characters in body
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