Mass function

Mass function may refer to:


 * Binary mass function, a function that gives the minimum mass of a star or planet in a spectroscopic binary system
 * Halo mass function, a function that describes the mass distribution of dark matter halos
 * Initial mass function, a function that describes the distribution of star masses when they initially form, before evolution
 * Probability mass function, a function that gives the probability that a discrete random variable is exactly equal to some value