A variant of this operation is given by the sum from “n equals zero to infinity” of “one over n-factorial” times an n-dimensional integral, where all of the integral’s limits are t-sub-zero to t. This operation is applied to an integral over the gauge field in a Wilson (-5[1])line. Every strongly continuous one-parameter (-5[1])unitary group can be written in terms of this operation applied to some self-adjoint A by Stone’s theorem. Elements of a Lie group (-5[1])are generated by applying a (*) map named for this operation (10[2])to elements of a (10[1])Lie algebra. The time evolution operator is given by this operation applied to negative “i t (10[1])over (10[1])h-bar times the Hamiltonian.” (10[1])For a matrix A, this (10[1])operation is defined via a Taylor series (10[2])beginning “I plus A (-5[1])plus A-squared over 2.” For 10 points, give this operation whose inverse is the natural logarithm. (10[1])■END■ (10[2])