dnormt3                 Density function of sum of Gaussian and
                        Student's t on 3 df
dst                     Density function of sphered Student's t
                        distribution
erf                     Error function
erfc                    Complementary error function
ic1                     Compute IC1 formula from Nason (2005)
is1                     Compute IS1 formula from Nason (2005)
normt3ip                Compute inner product function of Gaussian and
                        t3 distribution
wofz                    Faddeeva function
