regular

  • 131Regular prime — In number theory, a regular prime is a certain kind of prime number. A prime number p is called regular if it does not divide the class number of the p th cyclotomic field (that is, the algebraic number field obtained by adjoining the p th root… …

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  • 132Regular measure — In mathematics, a regular measure on a topological space is a measure for which every measurable set is approximately open and approximately closed .DefinitionLet ( X , T ) be a topological space and let Σ be a sigma; algebra on X that contains… …

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