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A Radon measure is a Borel measure that is finite on compact sets.

A polynomial having only real numbers as coefficients. A polynomial with real coefficients is a product of irreducible polynomials of first and second degrees.

A scalene triangle is a triangle that has three unequal sides, such as those illustrated above.

A topological space is second countable if it has a countable topological basis.

A semiprime ring which is also an Artinian ring.

The dual polyhedron of the small dodecicosidodecahedron U_(33) and Wenninger dual W_(72).

An affine transformation that preserves area.

A perimeter-bisecting line segment which originates at a vertex of a polygon. The three splitters of a triangle concur in a point known as the Nagel point Na.

The integral transform (Kf)(x)=Gamma(p)int_0^infty(x+t)^(-p)f(t)dt. Note the lower limit of 0, not -infty as implied in Samko et al. (1993, p. 23, eqn. 1.101).

Let P(L) be the set of all prime ideals of L, and define r(a)={P|a not in P}. Then the Stone space of L is the topological space defined on P(L) by postulating that the sets ...