(mathematics) a completely multiplicative function on the positive integers that is defined as equal to one for a special value and zero otherwise:

(astronomy, mathematics) A relationship that describes the mass distribution.

plural of unit function

(mathematics) function giving the statistical correlation between random variables at two different points in space or time

plural of correlation function

plural of stream function

plural of control function

plural of discriminant function

plural of partition function

(mathematics, physics) A function of seven variables of the form f(x,y,z,t;v_x,v_y,v_z) that gives the number of particles per unit volume in single-particle phase space.