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A quantity which changes sign when indices are reversed. For example, A_(ij)=a_i-a_j is antisymmetric since A_(ij)=-A_(ji).

A surface which has no edges.

A group of sociable numbers of order 3.

A mathematical statement of the equivalence of two quantities. The equality "A is equal to B" is written A=B.

An arbitrary rotation may be described by only three parameters.

An operator A^~ such that A^~^2=A^~ or an element of an algebra x such that x^2=x.

The double covering group of the (linear) symplectic group.

The Fermat number F_n is prime iff 3^(2^(2^n-1))=-1 (mod F_n).

p^~=|phi_i(x)><phi_i(t)| (1) p^~sum_(j)c_j|phi_j(t)>=c_i|phi_i(x)> (2) sum_(i)|phi_i(x)><phi_i(x)|=1. (3)

The words random and stochastic are synonymous.