(mathematics, statistics) A sigmoid function giving the probability that a measurement, under the influence of normally distributed errors with standard deviation, is within a certain distance from the mean value.

(mathematics, cryptography) A function that is easy to compute in one direction but difficult to compute in the opposite direction (finding its inverse) without special information.

plural of trapdoor function

(mathematics) A function whose domain is the empty set.

(mathematics) The signum function.

plural of floor function

plural of ceil function

plural of ceiling function

plural of sign function

(mathematics) A function that maps a real number to the largest integer that is not greater than it.