Last Updated :2025/12/03

field of quotients

整域から分数体を構成するには、各元を第二成分が0でない有序対 (a,b) の同値類として表し、加法を (a,b)+(a',b')=(ab'+a'b,bb')、乗法を成分ごとに定義する。

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(algebra) A field all of whose elements can be represented as ordered pairs each of whose components belong to a given integral domain, such that the second component is non-zero, and so that the additive operator is defined like so: (a,b)+(a',b')=(ab'+a'b,bb'), the multiplicative operator is defined coordinate-wise, the zero is (0,1), the unity is (1,1), the additive inverse of (a,b) is (-a,b), equivalence is defined like so: (a,b)≡(a',b') if and only if ab'=a'b, and multiplicative inverse of a non-zero–equivalent element (a,b) is (b,a).

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field of quotients

To construct the field of quotients from an integral domain, one represents each element as an equivalence class of ordered pairs (a,b) with b nonzero and defines addition by (a,b)+(a',b')=(ab'+a'b,bb') and multiplication coordinate-wise.

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To construct the field of quotients from an integral domain, one represents each element as an equivalence class of ordered pairs (a,b) with b nonzero and defines addition by (a,b)+(a',b')=(ab'+a'b,bb') and multiplication coordinate-wise.

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