Results 161 to 170 of about 55,957 (170)

Magnitude of fourier coefficients and degree of approximation by riemann sums

Numerical Functional Analysis and Optimization, 1991
We compare rates of decay of the cosine Fourier coefficients of a 2φ-periodic function f with that of Riemann sum of f over [0, 2φ] minus .
D. J. Newman, O. Shisha
openaire   +1 more source

Unsteady MHD Couette Flows in an Annuli: The Riemann-Sum Approximation Approach

Journal of the Physical Society of Japan, 2010
The unsteady MHD Couette flow of a viscous incompressible electrically conducting fluid between two concentric horizontal cylinders of infinite length have been analysed when the outer cylinder has been set into uniform accelerated motion. A unified closed form expressions are derived corresponding to the cases of the magnetic field fixed relative to ...
Basant K. Jha, Clement A. Apere
openaire   +1 more source

Cauchy and Riemann Sums, Factorials, Ramanujan Numbers and Their Approximations

2016
After a short recall of the basic asymptotic relations “big O” and “small o”, we consider the Cauchy sums of the form \(\displaystyle \sum _{a\le k 0\); in the case where \(\alpha =1\) these are strictly related to the celebrated Riemann sums. After having learned how to approximate such sums, we apply the results to the approximation of sums of the ...
Mariconda C., Tonolo A.
openaire   +2 more sources

Note on Degree of Approximation to an Integral by Riemann Sums

The American Mathematical Monthly, 1937
J. L. Walsh, W. E. Sewell
openaire   +1 more source

APPROXIMATIVE RIEMANN-SUMS FOR IMPROPER INTEGRALS

The Quarterly Journal of Mathematics, 1941
openaire   +1 more source

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