Search results for #Extremalcombinatorics
A bit of geometry, combinatorics, and number theory #Geometry #CombinatorialGeometry #Polygon #ExtremalCombinatorics #RightAngle #Angles #IMOShortlist
✨ Just appeared in #Combinatorica Freddie Illingworth, Richard Lang, Alp Müyesser @OxUniMaths, Olaf Parczyk, Amedeo Sgueglia: "Spanning Spheres in Dirac Hypergraphs" #Extremalcombinatorics 🔓 #OpenAccess link.springer.com/article/10.100…
IMO ShortList 2008, Combinatorics problem 3 #Geometry #IMOShortlist #Combinatorics #ExtremalCombinatorics #PointSet #PigenholePrinciple #BezoutSIdentity
g(G)^3 <= c * f(G)^4 #Inequalities #GraphTheory #ExtremalCombinatorics #IMOShortlist
Subset Y, |Y| = 2007 and mod(a - b + c - d + e, 47) <> 0 #ModularArithmetic #NumberTheory #Divisibility #ExtremalCombinatorics #AdditiveCombinatorics #IMOShortlist
How many people are at the meeting? #Combinatorics #GraphTheory #ExtremalCombinatorics #IMOShortlist
Related blue squares in 4m by 4m board #Combinatorics #EGMO #EGMO2016 #Coloring #ExtremalCombinatorics
Is it always possible to color the points red or white? #GraphTheory #Combinatorics #IMO #Coloring #RamseyTheory #ExtremalCombinatorics #IMO1986
IMO ShortList 1999, algebra problem 2 #Inequalities #Combinatorics #ExtremalCombinatorics #Matrix #IMOShortlist
Maximum number of terms in the sequence #LinearAlgebra #Algebra #Sequence #Maximization #ExtremalCombinatorics #IMO #IMO1977
IMO ShortList 2001, combinatorics problem 8 #Matrix #Combinatorics #IMO #RamseyTheory #ExtremalCombinatorics #IMO2001 #IMOShortlist
IMO Shortlist 2012, Combinatorics 2 #IMOShortlist #Combinatorics #ExtremalCombinatorics #Doublecounting #Hi
Problem 2: good diagonals and triangles in 2006-gon #Combinatorics #Polygon #ExtremalCombinatorics #IMO #IMO2006 #IMOShortlist #DusanDjukic
IMO ShortList 1999, combinatorics problem 5 #Combinatorics #ExtremalCombinatorics #Matrix #IMO #IMO1999 #IMOShortlist
Column/Row contains a block of k adjacent unoccupied squares #Combinatorics #ExtremalCombinatorics #IMOShortlist #GraphTheory #Chessboard
Correspondance by mail #Combinatorics #RamseyTheory #Coloring #GraphTheory #IMO #IMO1964 #ExtremalCombinatorics
IMO Shortlist 2011, Combinatorics 7 #Inequalities #Combinatorics #IMOShortlist #ExtremalCombinatorics
Maximize non-intersecting/perpendicular diagonals! #Combinatorics #IMOShortlist #ExtremalCombinatorics #Hi
IMO ShortList 2008, Combinatorics problem 1 #Geometry #Rectangle #Combinatorics #CombinatorialGeometry #IMOShortlist #ExtremalCombinatorics
Covering any 3 points with 1-strip => cover all with 2-strip #Induction #Geometry #Trigonometry #CombinatoricsProposed #Combinatorics #ExtremalCombinatorics
