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If q is logically deducible from p, this is written p|-q.

A matrix whose eigenvectors are not complete.

If A and B are equal by definition (i.e., A is defined as B), then this is written symbolically as A=B, A:=B, or sometimes A≜B.

The property of being degenerate.

Given an undirected graph, a degree sequence is a monotonic nonincreasing sequence of the vertex degrees (valencies) of its graph vertices. The number of degree sequences for ...

The number of degrees of freedom in a problem, distribution, etc., is the number of parameters which may be independently varied.

One of the three 2-polyaboloes.

A metric g_(ij) which is zero for i!=j.

A cryptarithmetic in which digits are used to represent other digits.

The number of digits D in an integer n is the number of numbers in some base (usually 10) required to represent it. The numbers 1 to 9 are therefore single digits, while the ...