Minimal transitive products of transpositions---the reconstruction of a proof of A. Hurwitz.
Minimale Gitterwege mit Nebenbedingungen.
Minimally intersecting set partitions of type B.
Modular, -noncrossing diagrams.
Modulo study of the mahonian statistics. (Étude modulo des statistiques mahoniennes.)
Monomial nonnegativity and the Bruhat order.
Monomorphisms in spaces with Lindelöf filters
is the category of spaces with filters: an object is a pair , a compact Hausdorff space and a filter of dense open subsets of . A morphism is a continuous function for which whenever . This category arises naturally from considerations in ordered algebra, e.g., Boolean algebra, lattice-ordered groups and rings, and from considerations in general topology, e.g., the theory of the absolute and other covers, locales, and frames, though we shall specifically address only one of these...
More statistics on permutation pairs.
Motzkin numbers of higher rank: generating function and explicit expression.
Motzkin paths and powers of continued fractions.
Motzkin paths and reduced decompositions for permutations with forbidden patterns.
Multi-ordered posets.
Multiple convolution formulae on classical combinatorial numbers.
Multiple pattern avoidance with respect to fixed points and excedances.
Multi-static enumeration of two-stack sortable permutations.