The maximum degree of planar graphs I. Series-parallel graphs
The Maximum Degree-and-Diameter-Bounded Subgraph in the Mesh
The maximum distinguishing number of a group
The maximum independent sets of de Bruijn graphs of diameter 3
The maximum number of cliques in a graph embedded in a surface
The maximum number of perfect matchings in graphs with a given degree sequence
The Maximum of the Maximum Rectilinear Crossing Numbers of d-regular Graphs of Order n
The maximum spectral radius of C_4-free graphs of given order and size
The maximum sum and product of sizes of cross-intersecting families
The Maximum Wiener Index of Trees with Given Degree Sequences
The median Genocchi numbers, Q-analogues and continued fractions
The ménage problem with a known mathematician
The Merrifield-Simmons conjecture holds for bipartite graphs
The method of characteristics, and "problem 89" of Graham, Knuth and Patashnik
The Method of Combinatorial Telescoping
The method of double chains for largest families with excluded subposets
The Method of Undetermined Generalization and Specialization Illustrated with Fred Galvin's Amazing Proof of the Dinitz Conjecture
The Metric Dimension of Lexicographic Product of Graphs
The Metric Dimension of Regular Bipartite Graphs
The minimal density of triangles in tripartite graphs