| a positive integer that is not divisible without remainder by any integer except itself and 1, with 1 often excluded |
| pertaining to the mathematical prerequisites for the study of calculus, as algebra, analytical geometry, and trigonometry |
duality
in mathematics, principle whereby one true statement can be obtained from another by merely interchanging two words. It is a property belonging to the branch of algebra known as lattice theory, which is involved with the concepts of order and structure common to different mathematical systems. A mathematical structure is called a lattice if it can be ordered in a specified way (see order). Projective geometry, set theory, and symbolic logic are examples of systems with underlying lattice structures, and therefore also have principles of duality.
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