Ordered Partition of a Set: Combinatorics, Mathematics, Sequence, Subset, Disjoint Sets, Set, Exponential Generating Function

Ordered Exponential: Mathematics, Non Commutative, Algebra, Exponential Function, Integral, Function

Plane Partition: Mathematics, Percy Alexander MacMahon, Generating Function

Convex function: function, Mathematics, Function (mathematics), Subset, Interval (mathematics)

Rule of Sum: Combinatorics, Combinatorial Principles, Set Theory, Disjoint Sets, Inclusion Exclusion Principle