plural of fencepost problem

plural of scientific problem

The need to make a decision between alternatives that are both desirable.

A kind of puzzle in which there is one common factor in a first set of diagrams that is missing from a second set. The solver (possibly a computer program) must identify this factor.

To solve problems.

(mathematics) The question as to the value of ∑ₙ₌₁ ᪲1/(n²), the sum of the reciprocals of the squares of the positive integers.

(euphemistic) A child who is particularly difficult to raise or educate, especially due to a lack of self-control and disruptive and antisocial behavior.

A mental representation of a particular problem, including initial, final and possible intermediate states

An observation that contradicts an accepted law or theory.

(computer science) The problem of deciding in finite time whether a given program will finish running in finite time, when given a certain finite input.