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 mass distribution of a population of stars in terms of their initial mass
Probability mass function, a function that gives the probability that a discrete random variable is exactly equal to some value

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