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Date: 18-2-2020
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Date: 16-8-2020
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Date: 21-10-2019
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Let be an order of an imaginary quadratic field. The class equation of
is the equation
, where
is the extension field minimal polynomial of
over
, with
the
-invariant of
. (If
has generator
, then
. The degree of
is equal to the class number of the field of fractions
of
.
The polynomial is also called the class equation of
(e.g., Cox 1997, p. 293).
It is also true that
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where the product is over representatives of each ideal class of
.
If has discriminant
, then the notation
is used. If
is not divisible by 3, the constant term of
is a perfect cube. The table below lists the first few class equations as well as the corresponding values of
, with
being generators of ideals in each ideal class of
. In each case, the constant term is written out as a cube times a cubefree part.
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REFERENCES:
Cox, D. A. Primes of the Form x2+ny2: Fermat, Class Field Theory and Complex Multiplication. New York: Wiley, 1997.
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منها نحت القوام.. ازدياد إقبال الرجال على عمليات التجميل
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دراسة: الذكاء الاصطناعي يتفوق على البشر في مراقبة القلب
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هيئة الصحة والتعليم الطبي في العتبة الحسينية تحقق تقدما بارزا في تدريب الكوادر الطبية في العراق
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