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The use of three prior points in a root-finding algorithm to estimate the zero crossing.

The British word for "zero." It is often used to indicate 0 subscripts, so a_0 would be spoken as "a naught."

A ring in which the zero ideal is an irreducible ideal. Every integral domain R is irreducible since if I and J are two nonzero ideals of R, and a in I, b in J are nonzero ...

Two vectors u and v are parallel if their cross product is zero, i.e., uxv=0.

A cusp form is a modular form for which the coefficient c(0)=0 in the Fourier series f(tau)=sum_(n=0)^inftyc(n)e^(2piintau) (1) (Apostol 1997, p. 114). The only entire cusp ...

The multiplicative suborder of a number a (mod n) is the least exponent e>0 such that a^e=+/-1 (mod n), or zero if no such e exists. An e always exists if GCD(a,n)=1 and n>1. ...

The axis in the complex plane corresponding to zero real part, R[z]=0.

An assemblage of faces forming a polyhedron of zero volume (Holden 1991, p. 124).

The sequency k of a Walsh function is defined as half the number of zero crossings in the time base.

A ring of fractions that coincides with the localization with respect to the set of all non-zero divisors.