کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4637282 | 1340738 | 2006 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The second kind Chebyshev quadrature rules of semi-open type and its numerical improvement
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
ریاضیات کاربردی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The second kind Chebyshev quadrature rules of semi-open type and its numerical improvement The second kind Chebyshev quadrature rules of semi-open type and its numerical improvement](/preview/png/4637282.png)
چکیده انگلیسی
One of the less-known integration methods is the weighted Newton-Cotes quadrature rule of semi-open type, which is shown by:â«a=x0b=xn+1=x0+(n+1)hf(x)w(x)dxââk=0nwkf(x0+kh),where w(x) is a weight function on [a, b] and h=b-an+1 is the step size. There are various cases for the weight function w(x) that one can use. Here we consider the weight function w(x)=1-x2, which is important in Numerical Analysis. Therefore, in this paper, we would face with the following formula:â«-1+1f(x)1-x2dxââk=0nwkf-1+2k(n+1).It is known that the precision degree of above formula is n + 1 for even n's and is n for odd n's. But we consider the upper and lower bounds as two additional variables to reach a nonlinear system that numerically improves the precision degree of above formula up to degree n + 2. In this way, we also give some examples to show the numerical superiority of our idea.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Mathematics and Computation - Volume 172, Issue 1, 1 January 2006, Pages 210-221
Journal: Applied Mathematics and Computation - Volume 172, Issue 1, 1 January 2006, Pages 210-221
نویسندگان
M. Masjed-Jamei, S.M. Hashemiparast, M.R. Eslahchi, Mehdi Dehghan,