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亏格是代数曲线的重要不变量.文章给出计算一类平面代数曲线亏格上界的符号-数值混合算法.首先通过数值稳定的符号-数值混合算法把代数曲线的定义多项式系统约化到几何对合形式,然后考察奇点的性质.如果曲线的奇点是寻常的,那么由奇点的重数可以计算出代数曲线的亏格;否则算法仅给出亏格的一个上界. 相似文献
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In this paper a relativistic many-body perturbation calculation is
performed to calculate the hyperfine constants of the ground states
for lithium-like isoelectronic sequence. Zeroth-order hyperfine
constants are calculated with Dirac--Fock wavefunctions, and the
finite basis sets of the Dirac--Fock equations are constructed by B
splines. With the finite basis sets, the core polarization and the
correlation effect are evaluated. 相似文献
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将Reid和Zhi提出的符号数值混合消元方法应用于求解多项式优化问题,将多项式优化问题转化为矩阵最小特征值求解问题,并在Maple软件中实现了算法. 相似文献
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Some triply excited states of He^- ion are studied using the saddle-point complex-rotation method. The energies and Auger widths of these resonances are calculated with the relativistic corrections and mass polarization taken into account. The total Auger width is obtained by coupling the important open channels and summing over the other channels. These results are in good agreement with other theoretical and experimental data in the literature. 相似文献
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Relativistic Energies and Auger Widths of High-Lying Doubly-Excited States 1s^23lnl′ ^1De in Be-Like O^4+ Ions 下载免费PDF全文
The saddle-point variational method and restricted variational method are used to calculate energies of doublyexcited singlet states 1s^23lnl′ (n =3-.) ^1 De in Be-like O^4+ ions, including the mass polarization and relativistic corrections. The saddle-point complex-rotation method is used to compute the Auger widths and Auger transition rates. These results are compared with other theoretical and experimental data in the literature. 相似文献
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本工作采用组态相互作用波函数计算了He和Be^2 离子高位双激发态^3P^e和^D^e的能量和精细结构,并计算相对论修正、质量极化、振子强度和跃迁率。我们采用新量子数集K、T、A分析双激发态里德伯系列的变化规则,计算结果与试验结果符合很好。 相似文献
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本工作采用组态相互作用波函数计算了He和Be2+离子高位双激发态3Pe和3De的能量和精细结构,并计算相对论修正、质量极化、振子强度和跃迁率.我们采用新量子数集K、T、A分析双激发态里德伯系列的变化规则,计算结果与试验结果符合很好. 相似文献
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