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The set of all centroid points in a weighted tree (Harary 1994, p. 36).

Johnson solid J_(83).

The collection of twistors in Minkowski space that forms a four-dimensional complex vector space.

An error in a statistical test which occurs when a true hypothesis is rejected (a false negative in terms of the null hypothesis).

The figure formed when the midpoints of adjacent sides of a quadrilateral are joined. Varignon's theorem demonstrated that this figure is a parallelogram. The center of the ...

A linkage used in the original steam engine to turn back-and-forth motion into approximately straight-line motion.

Any discrete finite wavelet transform can be represented as a matrix, and such a wavelet matrix can be computed in O(n) steps, compared to O(nlgn) for the Fourier matrix, ...

One name for the figure used by Euclid to prove the Pythagorean theorem.

The path of an object through phase space.

A number N=p_1p_2...p_n where the p_is are distinct primes and n>=3 such that p_i=Ap_(i-1)+B (1) for i=1, 2, ..., n, p_0 taken as 1, and with A and B some fixed integers. For ...