Noun
combinatorics (uncountable)
(mathematics) a branch of mathematics that studies (usually finite) collections of objects that satisfy specified criteria
We don't have enough parallel universes to allow all uses of all junction types--in the absence of quantum computing the combinatorics are not in our favor... Larry Wall
The emphasis on mathematical methods seems to be shifted more towards combinatorics and set theory - and away from the algorithm of differential equations which dominates mathematical physics. John von Neumann
Algebraic combinatorics is continuously expanding its scope, in both topics and techniques, and can be seen as the area of mathematics where the interaction of combinatorial and algebraic methods is particularly strong and significant. Source: Internet
Additive combinatorics refers to the special case when only the operations of addition and subtraction are involved. Source: Internet
A mathematician who studies combinatorics is called a combinatorialist or a combinatorist. Source: Internet
Another occurrence of this number is in combinatorics, where it gives the number of ways, disregarding order, that k objects can be chosen from among n objects; more formally, the number of k-element subsets (or k- combinations ) of an n-element set. Source: Internet