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Results tagged with co.combinatorics
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user 47344
Enumerative combinatorics, graph theory, order theory, posets, matroids, designs and other discrete structures. It also includes algebraic, analytic and probabilistic combinatorics.
13
votes
1
answer
3k
views
Is this proof of union closed set conjecture verified? [closed]
I have always found union closed conjecture very interesting. There is an arxiv article claiming the solve the problem. My background is not appropriate to read the proof. Is this proof verified or wr …
- 1,169
4
votes
1
answer
249
views
Is this property of the Bell's number evident?
Let $B(n)$ denote the Bell's number which is the number of the equivalence relation which can be defined on a set of cardinality $n$.
While I was trying to solve a problem, I reached another result;
…
- 1,169