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The free part of the homology group with a domain of coefficients in the group of integers (if this homology group is finitely generated).

If a and b are integers not both equal to 0, then there exist integers u and v such that GCD(a,b)=au+bv, where GCD(a,b) is the greatest common divisor of a and b.

A maximal subgraph of an undirected graph such that any two edges in the subgraph lie on a common simple cycle.

Johnson solid J_(50).

The study of the nature and properties of bifurcations.

The ordinary differential equation (y^')^m=f(x,y) (Hille 1969, p. 675; Zwillinger 1997, p. 120).

A convex planar domain in which the minimal generalized diameter is >1 always contains a circle of radius 1/3.

A generalization of Schröter's formula.

A finite or infinite square matrix with rational entries. (If the matrix is infinite, all but a finite number of entries in each row must be 0.) The sum or product of two ...

The domain of Booleans, sometimes denoted B, consisting of the elements True and False, implemented in the Wolfram Language as Booleans. In the Wolfram Language, a quantity ...