Use of terms from logic [closed]

1. What is closed logic?
2. What is a closed formula in logic?
3. What is a term as used in logic?
4. What is a closed-form function?

What is closed logic?

A closed expression (or closed formula) refers to a formula that has no free variables [1]. This is also called sentence. In a logic system, you have a set of axioms, which are sentences, and rules which state how to derive a sentence from this [2].

What is a closed formula in logic?

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

What is a term as used in logic?

term, in logic, the subject or predicate of a categorical proposition (q.v.), or statement. Aristotle so used the Greek word horos (“limit”), apparently by an analogy between the terms of a proportion and those of a syllogism.

What is a closed-form function?

A closed form is an expression that can be computed by applying a fixed number of familiar operations to the arguments. For example, the expression 2 + 4 + … + 2n is not a closed form, but the expression n(n+1) is a closed form. ak. k=1.