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lowndrul
  • Member for 13 years, 3 months
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  • San Francisco, CA
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Approximation to the ratio of a Gaussian CDF to PDF
@Zen: Ahh, nice trick. Then you generate a power series in $1/x$---the one given by @Robert below.
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Approximation to the ratio of a Gaussian CDF to PDF
@Deane: Ahh yes. Easy. I suspected. :( Second derivatives of numerator and denominator do the trick.
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Approximation to the ratio of a Gaussian CDF to PDF
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