Library "ctnd"

Double precision algorithm to compute the cumulative trivariate normal distribution
found in A.Genz, Numerical computation of rectangular bivariate and trivariate normal
and t probabilities”, Statistics and Computing, 14, (3), 2004. The cumulative trivariate
normal is needed to price window barrier options, see G.F. Armstrong, Valuation formulae
or window barrier options”, Applied Mathematical Finance, 8, 2001.

The Complete Guide to Option Pricing Formulas, 2nd ed. (Espen Gaarder Haug)

  Returns the Cumulative Trivariate Normal Distribution
    LIMIT1: float,
    LIMIT2: float,
    LIMIT3: float,
    SIGMA1: float,
    SIGMA2: float,
    SIGMA3: float,
  Returns: float.

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