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Apr
13
comment Segments on a family of parallel lines
For the case of infinite $I$, we can argue as follows: Fix two distinct $i,j\in I$. Then $X=L_i\cap L_j$ is compact, and we have that $X\cap\bigcap_{k\in J}(X\cap L_k)\neq\emptyset$ for every finite $K\subseteq I$. But now all considered sets in the intersection are closed subsets of the compact set $X$, and it follows that $\bigcap_{i\in I}L_i\neq\emptyset$.
Feb
1
awarded  Yearling
Jan
25
awarded  Custodian
Jan
25
reviewed Approve Counting linearly ordered subsets of maximal length in partially ordered $d$-tuples of nonnegative integers
Jan
24
revised Counting linearly ordered subsets of maximal length in partially ordered $d$-tuples of nonnegative integers
added 407 characters in body
Jan
24
answered Counting linearly ordered subsets of maximal length in partially ordered $d$-tuples of nonnegative integers
Jan
23
comment Is the Manickam-Miklós-Singhi Conjecture solved?
The paper has appeared link.springer.com/article/10.1134%2FS0032946014040048
Jan
3
revised covering designs of the form $(v,k,2)$
added 208 characters in body
Jan
3
revised covering designs of the form $(v,k,2)$
added 470 characters in body
Jan
3
revised covering designs of the form $(v,k,2)$
added 341 characters in body
Jan
3
revised covering designs of the form $(v,k,2)$
added 341 characters in body
Jan
3
revised covering designs of the form $(v,k,2)$
added 178 characters in body
Jan
3
answered covering designs of the form $(v,k,2)$
Dec
29
answered Stable Household Formation
Dec
27
awarded  Enlightened
Dec
27
awarded  Nice Answer
Dec
26
revised Collection of conjectures and open problems in graph theory
added 78 characters in body
Dec
26
answered Collection of conjectures and open problems in graph theory
Nov
13
answered Origin of the numbers game
Nov
13
answered Combinatorial Databases