(mathematics) A form (expression) that does not use limits, implicitly or explicitly. / (mathematics) A differential form whose exterior derivative is zero.

Expressing finality, that that preceding material is meant as final, not subject to amendation or variation.

plural of closed circuit

(mathematical analysis) A ball which contains its boundary, i.e., a ball which is a closed set.

(rare, mathematics, of a set) Being the closure of its interior.

plural of closed file

(chess) A file with pawns of both colors on it.

(topology) A map from the circle, S¹, to a topological space.^((McLarty, p. 4))

(logic) A formula which has no free occurrences of variables; or equivalently, in which all occurrences of variables are bound.

A relatively small closed city