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Lemoine geometry is that part of triangle geometry concerned with symmedians and symmedian points.

The 30-faced dual of the truncated dodecadodecahedron and Wenninger dual W_(98).

Neville's algorithm is an interpolation algorithm which proceeds by first fitting a polynomial of degree 0 through the point (x_k,y_k) for k=1, ..., n, i.e., P_k(x)=y_k. A ...

A pentagon is a five-sided polygon. Several special types of pentagons are illustrated above. In particular, a pentagon with vertices equally spaced around a circle and with ...

A subvariety of an algebraic variety that is not the entire variety. The proper subvarieties of a line are its nonempty finite subsets, the proper subvarieties of a plane are ...

A quadrature (numerical integration) algorithm which has a number of desirable properties.

The polyhedron compound of the small rhombicuboctahedron and its dual, the deltoidal icositetrahedron. The compound can be constructed from a small rhombicuboctahedron of ...

The mean square deviation of the best local fit straight line to a staircase cumulative spectral density over a normalized energy scale.

Johnson solid J_(86).

Johnson solid J_(88).