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An error in a statistical test which occurs when a false hypothesis is accepted (a false positive in terms of the null hypothesis).

f(x)=1-2x^2 for x in [-1,1]. Fixed points occur at x=-1, 1/2, and order 2 fixed points at x=(1+/-sqrt(5))/4. The natural invariant of the map is rho(y)=1/(pisqrt(1-y^2)).

An operator T which maps some basic polynomial sequence p_n(x) into another basic polynomial sequence q_n(x).

A unar is an algebra A=(A,f), where f is a single unary operation.

Two quantities a and b which are not equal are said to be unequal, and this relationship can be denoted a!=b.

The series sum_(j=1)^(infty)f_j(z) is said to be uniformly Cauchy on compact sets if, for each compact K subset= U and each epsilon>0, there exists an N>0 such that for all ...

A union-closed set is a nonempty finite collection of distinct nonempty finite sets which is closed under union.

A uniquely k-colorable graph G is a chi-colorable graph such that every chi-coloring gives the same partition of G (Chao 2001). Examples of uniquely minimal colorable classes ...

Let A be a C^*-algebra, then two element a,b of A are called unitarily equivalent if there exists a unitary u in A such that b=uau^*.

An aliquot sequence computed using the analog of the restricted divisor function s^*(n) in which only unitary divisors are included.