Home

Solved problems

Titlesort iconAuthor(s)Imp.¹Rec.²Area » Topic » SubtopicPosted by
(2 + epsilon)-flow conjectureGoddyn; Seymour✭✭✭0Graph Theory » Coloring » Nowhere-zero flowsmdevos
5-coloring graphs with small crossing & clique numbersOporowski; Zhao✭✭1Graph Theory » Topological G.T. » Coloringmdevos
A construction of direct product in the category of continuous maps between endo-funcoidsPorton✭✭✭0Topologyporton
Alon-Saks-Seymour ConjectureAlon; Saks; Seymour✭✭✭0Graph Theory » Coloring » Vertex coloringmdevos
Atomic reloids are monovaluedPorton✭✭0Topologyporton
Bigger cycles in cubic graphs✭✭0Graph Theory » Basic G.T. » Cyclesmdevos
Bounded colorings for planar graphsAlon; Ding; Oporowski; Vertigan✭✭1Graph Theory » Topological G.T. » Coloringmdevos
Bounding the chromatic number of graphs with no odd holeGyarfas✭✭✭0Graph Theory » Coloring » Vertex coloringmdevos
Chain-meet-closed setsPorton✭✭0Unsortedporton
Characterization of monovalued reloids with atomic domainsPorton✭✭0Topologyporton
Choice number of complete multipartite graphs with parts of size 4✭1Graph Theory » Coloring » Vertex coloringJon Noel
Co-separability of filter objectsPorton✭✭0Unsortedporton
Coatoms of the lattice of funcoidsPorton✭0Topologyporton
Coloring squares of hypercubesWan✭✭1Graph Theory » Coloring » Vertex coloringmdevos
Colouring $d$-degenerate graphs with large girthWood✭✭1Graph Theory » ColoringDavid Wood
Complexity of QBF(Bounded Treewidth)Moshe Y. Vardi✭✭0Logic » Finite Model Theorymyvardi
Composition of atomic reloidsPorton✭✭0Topologyporton
Composition of reloids expressed through atomic reloidsPorton✭✭0Topologyporton
Decomposing the truncated octahedron into parallelepipeds✭1Geometry » Polytopesmdevos
Difference between neighbors in a matrixVadim Lioubimov✭1Combinatorics » MatricesVadim Lioubimov
DIS-PROOF OF BEALS CONJECTURE✭✭✭0Number Theory » Additive N.T.lalitha
Distributivity of a lattice of funcoids is not provable without axiom of choicePorton✭0Topologyporton
Distributivity of composition over union of reloidsPorton✭✭0Topologyporton
Distributivity of inward reloid over composition of funcoidsPorton✭✭0Topologyporton
Distributivity of outward reloid over composition of funcoidsPorton✭✭0Topologyporton
Distributivity of union of funcoids corresponding to reloidsPorton✭✭0Topologyporton
Do filters complementive to a given filter form a complete lattice?Porton✭✭0Unsortedporton
Does every subcubic triangle-free graph have fractional chromatic number at most 14/5?Heckman; Thomas✭0Graph Theory » Coloring » Vertex coloringAndrew King
Domain and image for Gamma-reloidPorton✭✭0Topologyporton
Domain and image of inner reloidPorton✭✭0Topologyporton
Entourages of a composition of funcoidsPorton✭✭0Topologyporton
Every monovalued reloid is metamonovaluedPorton✭✭0Topologyporton
Exponentially many perfect matchings in cubic graphsLovasz; Plummer✭✭✭0Graph Theory » Basic G.T. » Matchingsmdevos
Fowler's Conjecture on eigenvalues of (3,6)-polyhedraFowler✭✭0Graph Theory » Algebraic G.T.Robert Samal
Funcoid corresponding to inward reloidPorton✭✭0Topologyporton
Funcoid corresponding to reloid through lattice GammaPorton✭✭0Topologyporton
Geometric Hales-Jewett TheoremPor; Wood✭✭0GeometryDavid Wood
Good edge labeling and girthBode-Farzad-Theis✭✭0Graph Theory » Coloring » LabelingDOT
Hall-Paige conjectureHall; Paige✭✭✭0Group Theorymdevos
Hirsch ConjectureHirsch✭✭✭0Geometry » PolytopesRobert Samal
Hitting every large maximal clique with a stable setKing; Rabern✭✭1Graph TheoryAndrew King
Inequality of complex numbers✭✭1Analysisfeanor
Inner reloid through the lattice GammaPorton✭✭0Topologyporton
Intersection of complete funcoidsPorton✭✭0Topologyporton
Inward reloid corresponding to a funcoid corresponding to convex reloidPorton✭✭0Topologyporton
Is every regular paratopological group Tychonoff?unknown✭✭0Topologyporton
Join of oblique productsPorton✭✭0Topologyporton
Matching polynomials of vertex transitive graphsMohar✭✭0Graph Theory » Algebraic G.T.Robert Samal
Middle levels problemErdos✭✭0Graph Theory » Basic G.T. » Cyclestchow
Monochromatic reachability in edge-colored tournamentsErdos✭✭✭0Graph Theory » Directed Graphs » Tournamentsmdevos

Imp.¹: Importance (Low ✭, Medium ✭✭, High ✭✭✭, Outstanding ✭✭✭✭)
Rec.²: Recommended for undergraduates.