(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.

(mathematics) A formal power series with one indeterminate, whose coefficients encode a sequence that can be studied by algebraic manipulation of the series; any one of several generalizations, such as to encode more than one sequence or use more than one indeterminate.

(mathematics) Either of two functions that are solutions to Bessel's equation.

(mathematics) A function used to predict a categorical dependent variable by one or more continuous or binary independent variables.

(mathematics) a function used to calculate the distance between two points. / (topology) a metric.

(mathematics) A function used to plot streamlines that represent the trajectories of particles in a steady flow.

(mathematics) generalization of the definition of a partition function in statistical mechanics / (number theory) function that represents the number of possible partitions of a natural number.

(mathematics) function of the complex variable s that analytically continues the sum of the infinite series ∑ₙ₌₁ ᪲1/(nˢ) that converges when the real part of s is greater than 1.

(systems theory) A function that controls the recording, processing, transmission, or interpretation of data.

Synonym of Gabor atom