bn:00725544n
Noun Concept
EL
ιδανική ομάδα κατηγορίας  ομάδα τάξης
EN
In number theory, the ideal class group of an algebraic number field K is the quotient group JK/PK where JK is the group of fractional ideals of the ring of integers of K, and PK is its subgroup of principal ideals. Wikipedia
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