User talk:Nyet

$\operatorname {erfc} (x)={\frac {2}{\sqrt {\pi }}}\int _{x}^{\infty }e^{-t^{2}}\,dt={\frac {e^{-x^{2}}}{x{\sqrt {\pi }}}}\sum _{n=0}^{\infty }(-1)^{n}{\frac {(2n)!}{n!(2x)^{2n}}}$

$D_{F}(f_{i})=L_{F}(D_{0}+S_{0}(c/f_{i}-\lambda _{ref}))$

${\frac {2}{\sqrt {\pi }}}$