References
Forsythe, G. E., andW. R. Wasow: Finite difference methods for partial differential equations. New York: John Wiley & Sons 1960.
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The work presented in this paper is supported by the A.E.C. Computing and Applied Mathematics Center, New York University, under Contract AT (30-1)-1480 with the U.S. Atomic Energy Commission.
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Keller, H.B. On the accuracy of finite difference approximations to the eigenvalues of differential and integral operators. Numer. Math. 7, 412–419 (1965). https://doi.org/10.1007/BF01436255
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DOI: https://doi.org/10.1007/BF01436255