(combinatorics) A Boolean function f: Z ₂ⁿ→ Z ₂ whose Walsh transform has constant absolute value.

plural of bent function

plural of Walsh function

(mathematics) A formal power series with one indeterminate, whose coefficients are fractions with factorial denominators (of index corresponding to the power of the indeterminate) and numerators which represent a sequence of numbers that is to be studied.

(combinatorics) A function from the natural numbers to the set {−1, 0, 1} which maps perfect squares to 0, prime numbers to −1, and is multiplicative.

(psychiatry) A form of autism associated with lesser cognitive ability (an IQ of 70 or lower).

plural of functional water

Bottled water with added vitamins, minerals, etc., sold as a health drink.

plural of divisor function

plural of Baire function