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Per Alexandersson's user avatar
Per Alexandersson's user avatar
Per Alexandersson's user avatar
Per Alexandersson
  • Member for 14 years, 8 months
  • Last seen this week

13 Offered bounties for 800 reputation

21 votes
1 answer
1k views
+50

Tiling rectangle with trominoes — an invariant

8 votes
0 answers
168 views
+50

An Ehrhart positivity question related to Schur polynomials

2 votes
0 answers
54 views
+50

Notion of contractive map for certain set-valued functions

30 votes
1 answer
1k views
+100

Mysterious symmetry - in search for a bijection

16 votes
0 answers
360 views
+50

Combinatorial characterization of intersecting intervals in the plane

27 votes
2 answers
2k views
+50

A bijection between sets of Young tableaux of two kinds

9 votes
4 answers
1k views
+50

Positivity of Ehrhart polynomial coefficients

5 votes
1 answer
486 views
+100

Bijection between Littlewood-Richardson tableaux and ordinary skew tableaux?

25 votes
2 answers
687 views
+50

Convex hull of total orders

4 votes
5 answers
710 views
+50

Lattice points in dilated polytopes and sumsets

6 votes
2 answers
382 views
+50

Overlapping sets

5 votes
1 answer
486 views
+50

Bijection between Littlewood-Richardson tableaux and ordinary skew tableaux?

2 votes
1 answer
137 views
+100

Discriminant on boundary of semi-algebraic surface