= Ideal number
{wiki=Ideal_number}
An ideal number is a concept that appears in various mathematical contexts, but it is perhaps most commonly associated with the field of algebraic number theory, where it is linked to the notion of ideals in ring theory. In ring theory, an *ideal* is a special subset of a ring that has certain properties, making it a useful structure for generalizing concepts such as divisibility. An ideal allows for the definition of quotient rings, which are fundamental in many areas of mathematics.
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