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The backslash symbol \ is used to denote a set difference, quotient group, or integer division.

The antisymmetric parts of the Christoffel symbol of the second kind Gamma^lambda_(munu).

The digon is the degenerate polygon (corresponding to a line segment) with Schläfli symbol {2}.

Little-omega notation is the inverse of the Landau symbol o, i.e., f(n) in o(phi(n)) <==> phi(n) in omega(f(n)).

sigma=1/tau, where tau is the torsion. The symbol phi is also sometimes used instead of sigma.

The symbol ; given special meanings in several mathematics contexts, the most common of which is the covariant derivative.

For p an odd prime and a positive integer a which is not a multiple of p, a^((p-1)/2)=(a/p) (mod p), where (a|p) is the Legendre symbol.

A connective in logic which yields true if all conditions are true, and false if any condition is false. A AND B is denoted A ^ B (Mendelson 1997, p. 12), A&B, A intersection ...

Conditions arising in the study of the Robbins axiom and its connection with Boolean algebra. Winkler studied Boolean conditions (such as idempotence or existence of a zero) ...

A Banach algebra A for which H^1(A,X^*)=Z^1(A,X^*)/B^1(A,X^*)=0 for all Banach A-bimodules X is called amenable (or Johnson amenable; Helemskii 1989, 1997). This notion was ...