_csin_sub cacos_sub cacosh_sub casin_sub casinh_sub catan_sub catanh_sub ccos_sub ccosh_sub ccot ccot_sub cexp_sub cexpm1 cexpm1_sub clog1p clog1p_sub clog_sub csinh_sub ctan_sub ctanh_sub

clog1p_sub() void clog1p_sub ( doublecomplex  z, doublecomplex *  log1pz  ) Evaluate ln(1+z) accurate in the sense of relative error Purpose clog1p_sub evaluates ln(1 + z) accurately in the sense of relative error when z is very small. clog1p_sub is the subroutine version of clog1p. Parameters [in] z Complex argument z. (z != -1) [out] log1pz ln(1 + z). Error handling If z = -1, domain error (EDOM) occurs. If z is too near -1, range error (EDOM) occurs but calculation is continued (precision warning). Other range error (ERANGE) may occur.