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The Quarterly Journal of Mechanics and Applied Mathematics 1959 12(1):111-116; doi:10.1093/qjmam/12.1.111
© 1959 by Oxford University Press
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ON ‘BEST’ NINE-POINT LAPLACE DIFFERENCE ANALOGUES ON RECTANGULAR GRIDS

D. GREENSPAN

( (Mathematics Department, Purdue University Lafayette, Indiana, U.S.A. )

A known nine-point difference analogue of Laplace's equation is rederived for rectangular grids in such a fashion that it is readily established as a ‘best’ difference analogue by elementary methods.


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