integrality
integrality
English Definitions:
entirety, entireness, integrality, totality (noun)
the state of being total and complete
"he read the article in its entirety"; "appalled by the totality of the destruction"
integrality (Noun)
The condition of being integral
integrality
In commutative algebra, an element b of a commutative ring B is said to be integral over A, a subring of B, if there are n ≥ 1 and aj in A such that b n + a n − 1 b n − 1 + ⋯ + a 1 b + a 0 = 0. {\displaystyle b^{n}+a_{n-1}b^{n-1}+\cdots +a_{1}b+a_{0}=0.} That is to say, b is a root of a monic polynomial over A. The set of elements of B that are integral over A is called the integral closure of A in B. It is a subring of B containing A. If every element of B is integral over A, then we say that B is integral over A, or equivalently B is an integral extension of A. If A, B are fields, then the notions of "integral over" and of an "integral extension" are precisely "algebraic over" and "algebraic extensions" in field theory (since the root of any polynomial is the root of a monic polynomial). The case of greatest interest in number theory is that of complex numbers integral over Z (e.g., 2 {\displaystyle {\sqrt {2}}} or 1 + i {\displaystyle 1+i} ); in this context, the integral elements are usually called algebraic integers. The algebraic integers in a finite extension field k of the rationals Q form a subring of k, called the ring of integers of k, a central object of study in algebraic number theory. In this article, the term ring will be understood to mean commutative ring with a multiplicative identity.
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"integrality." Kamus.net. STANDS4 LLC, 2024. Web. 28 Apr. 2024. <https://www.kamus.net/english/integrality>.
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