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For every infinite loop space machine E, there is a natural equivalence of spectra between EX and Segal's spectrum BX.

Simple majority vote is the only procedure which is anonymous, dual, and monotonic.

Let a function h:U->R be continuous on an open set U subset= C. Then h is said to have the epsilon_(z_0)-property if, for each z_0 in U, there exists an epsilon_(z_0)>0 such ...

A Boolean sigma-algebra which possesses a measure.

In a lattice, any two elements a and b have a greatest lower bound. This greatest lower bound is often called the meet of a and b, and is denoted by a ^ b. One can also speak ...

A line of constant longitude on a spheroid (or sphere). More generally, a meridian of a surface of revolution is the intersection of the surface with a plane containing the ...

The mixtilinear circle is the circumcircle of the mixtilinear triangle, i.e., the triangle formed by the centers of the mixtilinear incircles. Neither its center not circle ...

A lattice which satisfies the identity (x ^ y) v (x ^ z)=x ^ (y v (x ^ z)) is said to be modular.

Spherical triangles into which a sphere is divided by the planes of symmetry of a uniform polyhedron.

A mathematical object which consists of a set of a single element, making it a 1-tuple. The yin-yang is also known as the monad.