erfcx_cody_middle()

double stan::math::opencl_kernels::erfcx_cody_middle

(

double

y

)

Cody (1969) second-interval rational, for 0.46875 <= x <= 4.

Yields erfcx directly: the exponential is cancelled analytically, so there is no exp and no erfc call.

Parameters

y

argument

Returns

scaled complementary error function

Definition at line 104 of file erfcx.hpp.