A useful approximation to 𝑒⁻𝑡2

Bellman, Richard; Kashef, B. G.; Vasudevan, R.

doi:10.1090/S0025-5718-1972-0298884-4

Mathematics of Computation

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A useful approximation to $e^{-}{}^{}{t} {}^{}{2}$
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by Richard Bellman, B. G. Kashef and R. Vasudevan PDF

Math. Comp. 26 (1972), 233-235 Request permission

Abstract:

Using differential approximation, we obtain a remarkably accurate representation of ${e^{ - {t^2}}}$ as a sum of three exponentials.

References

Richard Bellman, Methods of nonlinear analysis. Vol. 1, Mathematics in Science and Engineering, Vol. 61-I, Academic Press, New York-London, 1970. MR 0254299