(mathematics) A problem in combinatorics, in which 15 schoolgirls go walking three abreast for seven days in succession, and must be arranged so that no two walk abreast more than once.

Synonym of starlight problem

Synonym of stable marriage problem

The problem of finding a stable matching between two equal-sized sets of elements, given an ordering of preferences for each element.

(quantum mechanics) The general name for a vast category of physical problems pertaining to the properties of microscopic systems made of many interacting particles.

(US, humorous) Used to report that a (major) problem has occurred.

(mathematics) The problem of finding two disjoint sets A and B of n integers each, such that ∑_(a∈A)aⁱ=∑_(b∈B)bⁱ for each integer i from 1 to a given k.

plural of problemsolver

(rare) Someone who or something that solves a problem or problems.

Characterised or marked by problems