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If xsinalpha=sin(2beta-alpha), then (1+x)int_0^alpha(dphi)/(sqrt(1-x^2sin^2phi))=2int_0^beta(dphi)/(sqrt(1-(4x)/((1+x)^2)sin^2phi)).

A submodule L of a module M such that for any other nonzero submodule K of M, the intersection L intersection K is not the zero module. L is also called an essential ...

A generalization of the concept of set unions and intersections.

A lattice embedding is a one-to-one lattice homomorphism.

A point at the intersection of two or more grid lines in a point lattice.

The least common denominator of a collection of fractions (p_1)/(q_1),...,(p_n)/(q_n) is the least common multiple LCM(q_1,...,q_n) of their denominators.

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

The Lebombo bone is the oldest known mathematical artifact. It dates from 35000 BC and consists of 29 distinct notches that were deliberately cut into a baboon's fibula. It ...

A formula which counts the number of fixed points for a topological transformation.

A three-dimensional coordinate system in which the axes do not satisfy the right-hand rule.