B_erfc Function

public function B_erfc(r, gamm, dB, grad) result(B)

$$\begin{aligned} B(R,\gamma) &=\operatorname{erfc}(\gamma R) +\frac{2\gamma R}{\sqrt\pi}\mathrm e^{-(\gamma R)^2} \\ \partial B(R,\gamma) &=-\frac4{\sqrt\pi}(\gamma R)^2\mathrm e^{-(\gamma R)^2} (R\partial\gamma+\gamma\partial R) \end{aligned}$$

Arguments

Type	Intent	Optional	Attributes		Name
real(kind=dp),	intent(in)			::	r
real(kind=dp),	intent(in)			::	gamm
type(grad_scalar_t),	intent(out),	optional		::	dB
type(grad_request_t),	intent(in),	optional		::	grad

Return Value real(kind=dp)

Contents

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