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A method for constructing magic squares of singly even order n>=6.

Given a positive integer n, a labeled n-digraph is a digraph whose vertex set is {1,...,n}.

A Fourier series in which there are large gaps between nonzero terms a_n or b_n.

A function that has a natural boundary.

A lag system, introduced by Wang (1963), is a sort of opposite to a tag system. Lag systems allow dependence on more than just the first element, but remove only the first ...

The second-order ordinary differential equation y^('')+k/xy^'+epsilony^'y=0.

Coefficients which appear in Lagrange interpolating polynomials where the points are equally spaced along the abscissa.

The Lambert cylindrical equal-area projection is a cylindrical equal-area projection with standard parallel phi_s=0 degrees.

There are two curves commonly known as the Lamé curve: the ellipse evolute and the superellipse.

Whittaker and Watson (1990, pp. 539-540) write Lamé's differential equation for ellipsoidal harmonics of the first kind of the four types as ...