Does someone know useful formulae that might help evaluating this integral?
$$\int_0^\infty\mathrm{erf}^2(cx)\exp(-x^2)x^2\,dx,\quad c \in\mathbb{C}$$
Does someone know useful formulae that might help evaluating this integral?
$$\int_0^\infty\mathrm{erf}^2(cx)\exp(-x^2)x^2\,dx,\quad c \in\mathbb{C}$$
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Your integral (let's call it $J(c)$) is $${\frac {\arctan \left( \sqrt {2\,{c}^{2}+1} \right) }{\sqrt {\pi}}}-\frac{\sqrt{\pi}} 4+{\frac {{c}^{2}}{\sqrt {\pi (2\,{c}^{2}+1)} \left( {c}^{2}+1 \right) }} $$
at least for real $c$, where the integral converges. Note that
$$ \dfrac{dJ}{dc} = {\frac {5\,{c}^{3}+3\,c}{\sqrt {\pi} \left( 2\,{c}^{2}+1 \right) ^{3/2 } \left( {c}^{2}+1 \right) ^{2}}} $$ and integrate...