**Defined in theory: Kif-numbers****Source code: kif-numbers.lisp****Also defined in:**Physical-quantities, Scalar-quantities, Unary-scalar-functions, Basic-matrix-algebra, Tensor-quantities

**Documentation:**If $tau_1$, ..., $tau_n$ are numerical constants, then the term {tt (+ $tau_1 ... tau_n$)} denotes the sum $tau$ of the numbers

corresponding to those constants.

(Undefined (Arity +))