(astronomy) a relationship that specifies the mass distribution of a newly formed stellar population

(management) Any primary business function that would affect customers or profits if interrupted

The ratio of the Laplace transform of the primary feedback signal of a control system to that of the actuating signal

(mathematics) The logarithm of a trigonometric function

(mathematics) Any function that possesses a finite integral

(mathematics) A function which expresses numerically the loss produced by a decision or other event

(mathematics) Any function whose graph is a straight line: f(x)=ax+b

(computing) Any of a set of subroutines supplied with a language or system that can be called to perform standard mathematical functions efficiently

(logic, mathematics) A function that is equivalent to the NOT operator.

(astronomy) A relative measure of the relationship between stellar magnitude and the distribution of stars between magnitudes