The arithmetic of the product of two algebraic curves over a finite field
The arithmetic of the product of two algebraic curves over a finite field
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有限域上两条代数曲线乘积的算术
DOI:
10.1016/0021-8693(86)90018-9
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发表时间:
1986
期刊:
影响因子:
--
通讯作者:
N. Yui
中科院分区:
文献类型:
--
作者:
N. Yui
LetX=C1×C2be the product of two nonsingular projective curves defined over a finite fieldk=Fq. We compute the order of the Brauer group Br(X) ofX. In the generic case, it is given by the resultant of the characteristic polynomials of the Frobenius endomorphism of the Jacobian varietyJ(Ci) (i= 1, 2), divided by a certain power ofq. In particular, if at least one componentCihas ordinary Jacobian varietyJ(Ci), then the order of Br(X) is equal to the resultant divided byqpg, wherepgis the geometric genus ofX.