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A stack is a data structure which is a special kind of list in which elements may be added to or removed from the top only. These actions are called a push or a pop, ...

Defined for samples x_i, i=1, ..., N by alpha_r=1/Nsum_(i=1)^Nz_i^r=(mu_r)/(sigma^r), (1) where z_i=(x_i-x^_)/(s_x). (2) The first few are alpha_1 = 0 (3) alpha_2 = 1 (4) ...

A quantity (such as a statistical median, quartile deviation, etc.), which is calculated from observed data.

The smallest statistical rank (either up or down) of a set of data.

The ordinal number of a value in a list arranged in a specified order (usually decreasing).

1.5 times the H-spread.

A straight line embedding, or "straight line drawing," of a graph is a graph embedding in which all edges are drawn as straight line segments (as opposed to curves, etc.).

The straight polyomino of order n is the n-polyomino in which all squares are placed along a line.

A generalization of Ramsey theory to mathematical objects in which one would not normally expect structure to be found. For example, there exists a graph with very few ...

A tree G^' whose graph vertices and graph edges form subsets of the graph vertices and graph edges of a given tree G.