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A technical mathematical object which bears the same resemblance to binary relations as categories do to functions and sets.

Mathematical growth in which one population grows at a rate proportional to the power of another population.

Alpha is the name for the first letter in the Greek alphabet: alpha. In finance, alpha is a financial measure giving the difference between a fund's actual return and its ...

The term used in propositional calculus for the NAND connective. The notation A|B is used for this connective, a most unfortunate choice in light of modern usage of A|B or ...

A stereogram made of two pictures, one red and one blue, taken from offset positions. When the pictures are viewed through glasses with one lens of each color, the picture ...

Inference of the truth of an unknown result obtained by noting its similarity to a result already known to be true. In the hands of a skilled mathematician, analogy can be a ...

A definable set, also called a Souslin set.

The determination of the number of alternating permutations having elements {1,2,...,n}.

1. A fixed polyomino. 2. The set of points obtained by taking the centers of a fixed polyomino.

An antimagic graph is a graph with e graph edges labeled with distinct elements {1,2,...,e} so that the sum of the graph edge labels at each graph vertex differ.