Definition of Number theory

Babylon English Dictionary
branch of mathematics which deals with the natural numbers; numerology
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Number theory Definition from Encyclopedia Dictionaries & Glossaries
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Number theory (or arithmetic) is a branch of pure mathematics devoted primarily to the study of the integers. Number theorists study prime numbers as well as the properties of objects made out of integers (such as rational numbers) or defined as generalizations of the integers (such as, for example, algebraic integers).

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