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inflaton
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In my project, we enconter such kind of bessel's differential equation with stochastic source, like
[tex]\Phi''+\frac{1+2\nu}{\tau}\Phi'+k^2\Phi=\lambda\psi(\tau)[/tex]
where we use prime to denote the derivative with [tex]\tau[/tex], [tex]\nu[/tex]
and [tex]\lambda[/tex] are real constant parameter.
how to get the green function of bessel's differential equation?
[tex]\Phi''+\frac{1+2\nu}{\tau}\Phi'+k^2\Phi=\lambda\psi(\tau)[/tex]
where we use prime to denote the derivative with [tex]\tau[/tex], [tex]\nu[/tex]
and [tex]\lambda[/tex] are real constant parameter.
how to get the green function of bessel's differential equation?