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Open problem✭✭0Algebratigris35711
Guide✭✭0Algebratigris35711
The sum of the two largest eigenvalues (Solved)✭✭0Algebratigris35711
Hall-Paige conjecture (Solved)✭✭0Algebratigris35711
Monochromatic empty triangles✭✭0Algebratigris35711
Solution to the Lonely Runner Conjecture✭✭0Algebratigris35711
Seagull problem✭✭0Algebratigris35711
Algebra✭✭0Algebratigris35711
Shuffle-Exchange Conjecture✭✭0Algebratigris35711
Nowhere-zero flows✭✭0Algebratigris35711
Large induced forest in a planar graph.Abertson; Berman✭✭0Graph Theory » Topological G.T.fhavet
Coloring and immersionAbu-Khzam; Langston✭✭✭1Graph Theory » Coloring » Vertex coloringmdevos
Ádám's ConjectureÁdám✭✭✭0Graph Theory » Directed Graphsfhavet
Antidirected trees in digraphsAddario-Berry; Havet; Linhares Sales; Reed; Thomassé✭✭0Graph Theory » Directed Graphsfhavet
Growth of finitely presented groupsAdyan✭✭✭0Group Theorymdevos
Strong matchings and coversAharoni✭✭✭0Graph Theory » Infinite Graphsmdevos
Strong colorabilityAharoni; Alon; Haxell✭✭✭0Graph Theory » Coloring » Vertex coloringberger

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

Note: Resolved problems from this section may be found in Solved problems.

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