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A game for which each player has a different set of moves in any position. Every position in an impartial game has a nim-value.

Inspired by computer simulations of fossilized worms trails published by Raup and Seilacher (1969), computer scientist Mike Paterson at the University of Warwick and ...

The image of the path gamma in C under the function f is called the trace. This usage of the term "trace" is unrelated to the same term applied to matrices or tensors.

A 5-polyabolo.

A 50-sided polygon.

A group of five elements.

One of the four 5-polyiamonds are called pentiamonds.

A set P is called perfect if P=P^', where P^' is the derived set of P.

A sum over all cluster perimeters.

A point x_0 is said to be a periodic point of a function f of period n if f^n(x_0)=x_0, where f^0(x)=x and f^n(x) is defined recursively by f^n(x)=f(f^(n-1)(x)).