function mgf( t ) {
		if ( isnan( t ) ) {
			return NaN;
		}
		return exp( mu*t );
	}
Evaluates the moment-generating function (MGF) of a degenerate distribution.

@private
@param {number} t - input value
@returns {number} evaluated MGF

@example
var y = mgf( 10.0 );
// returns <number>