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Sampling at the Nyquist frequency.

A mathematical structure (e.g., a group, vector space, or smooth manifold) in a category.

In the American system, 10^(27).

In the American system, 10^(57).

A mathematical object upon which an operator acts. For example, in the expression 1×2, the multiplication operator acts upon the operands 1 and 2.

An orbifold is the object obtained by identifying any two points of a map which are equivalent under some symmetry of the map's group.

A signal sampled at a frequency higher than the Nyquist frequency is said to be oversampled beta times, where the oversampling ratio is defined as ...

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.

The Fermat number F_n is prime iff 3^(2^(2^n-1))=-1 (mod F_n).

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