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A cylindrical algebraic decomposition that omits sets of measure zero. Generic cylindrical algebraic decompositions are generally much quicker to compute than are normal ...

The dual of the great snub dodecicosidodecahedron and Wenninger dual W_(115).

The kernel of a group homomorphism f:G-->G^' is the set of all elements of G which are mapped to the identity element of G^'. The kernel is a normal subgroup of G, and always ...

The second-order ordinary differential equation (1+x^2)^2y^('')+lambday=0 (Hille 1969, p. 357; Zwillinger 1997, p. 122).

A term for number theory.

Let A be a unital C^*-algebra, then an element u in A is called an isometry if u^*u=1.

Two groups are isomorphic if the correspondence between them is one-to-one and the "multiplication" table is preserved. For example, the point groups C_2 and D_1 are ...

The Lebesgue identity is the algebraic identity (Nagell 1951, pp. 194-195).

The kernel of a linear transformation T:V-->W between vector spaces is its null space.

A branch point whose neighborhood of values wrap around an infinite number of times as their complex arguments are varied. The point z=0 under the function lnz is therefore a ...