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A positive-height (outward-pointing) pyramid used in augmentation. The term was introduced by B. Grünbaum.

Let the elliptic modulus k satisfy 0<k^2<1, and the Jacobi amplitude be given by phi=amu with -pi/2<phi<pi/2. The incomplete elliptic integral of the first kind is then ...

Let the elliptic modulus k satisfy 0<k^2<1. (This may also be written in terms of the parameter m=k^2 or modular angle alpha=sin^(-1)k.) The incomplete elliptic integral of ...

A space endowed with a non-Euclidean elliptic geometry.

Johnson solid J_(20).

Johnson solid J_(40).

Johnson solid J_9.

Johnson solid J_(18).

Johnson solid J_7.

Of opposite symmetry under reflection; mirror images.