On semiiterative methods generated by Faber polynomials
On semiiterative methods generated by Faber polynomials
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关于 Faber 多项式生成的半迭代方法
DOI:
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发表时间:
1989
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影响因子:
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通讯作者:
M. Eiermann
中科院分区:
文献类型:
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作者:
M. Eiermann
SummaryConsider a nonsingular system of linear algebraic equationsAx=b, or in fixed point formx=Tx+c, where the eigenvalues ofT are contained in some compact subset Ω of the complex plane. Using Faber polynomials, iteration methods of the form
$$y_m : = mu _{m,0} left( {c + Ty_{m - 1} }
ight) + mu _{m,1} y_{m - 1} + ldots + mu _{m,k} y_{m - k} ,$$
μm, 0 ≠, ∑μm, j=1 (for allm≧1), are constructed which include the Chebyshev iterative method as well as the stationaryk-step methods. When Ω is a rectangle, we also develop four-step methods which yield fast convergence in cases when the speed of convergence of the optimized Chebyshev method is poor.