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The Motzkin numbers enumerate various combinatorial objects. Donaghey and Shapiro (1977) give 14 different manifestations of these numbers. In particular, they give the ...

A prime field is a finite field GF(p) for p is prime.

The product of any number of perspectivities.

In the American system, 10^(18).

In the American system, 10^(21).

A translation without rotation or distortion.

There are certain optimization problems that become unmanageable using combinatorial methods as the number of objects becomes large. A typical example is the traveling ...

The series of Sturm functions arising in application of the Sturm theorem.

One of the 14 4-polyaboloes.

There are several different definitions of the term "unital" used throughout various branches of mathematics. In geometric combinatorics, a block design of the form (q^3+1, ...