plural of decidability

(obsolete) Means of forming a decision.

A falling off.

plural of decidement

plural of decided

(computing theory) Of a set, such that there is a deterministic algorithm such that (a) if an element is a member of the set, the algorithm halts with the result "positive", and (b) if an element is not a member of the set, (i) the algorithm does not halt, or (ii) if it does, then with the result "negative".

(mathematics) The property of being semi-decidable.