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Estimation of errors of quadrature formula for singular integrals of
Cauchy type with special forms
Estimation of errors of quadrature formula for singular integrals of
Cauchy type with special forms
2011-03-05
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arxiv.org/abs/1103.1034v1
Mathematics
Numerical Analysis
14 pages, 5 Tables
Scientific paper
In this work, we consider the singular integrals of Cauchy type of the forms $$\ds J(f,x)= \frac{\sqrt{1-x^2}}{\pi}\int_{-1}^1\frac{f(t)}{\sqrt{1-t^2}(t-x)}\,dt, -11$. With the help of linear spline interpolation, we have proved the rate of convergence of the errors of QFs \re{eq3} and \re{eq4} for different classes (i.e. $H^\a([-1,1],K), C^{m,\a}[-1,1], W^r[-1,1]$) of density function $f(t)$. It is shown that approximation by spline possesses more advantages than other kinds of approximation: it requires the minimum smoothness of density function $f(x)$ to get good order of decreasing errors.
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