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- Irfan Altas, Jonathan Dym, Murli M. Gupta, Ram P. Manohar
- SIAM J. Scientific Computing
- 1998

In this work, we use a symbolic algebra package to derive a family of nite diierence approximations for the biharmonic equation on a 9 point compact stencil. The solution and its rst derivatives are carried as unknowns at the grid points. Dirichlet boundary conditions are thus incorporatednaturally. Since the approximations use the 9 point compact stencil,… (More)

- Achi Brandt, Jonathan Dym
- SIAM J. Scientific Computing
- 1999

A line integral is defined as the integral of two-dimensional data along a (one-dimensional, straight) line of given length and orientation. Line integrals are used in various forms of edge and line detectors in images and in the computation of the Radon transform. We present a recursive algorithm which enables approximation of discretized line integrals at… (More)

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