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    \int_{k}^{\infty} e^{-a^{2}} dy (gauss int. w. finite lim.)

    I am doing a calculation of overlap between wavefunctions in a physics thesis, however this integral puzzles me: \int_{-L/2+\kappa a^{2}}^{\infty} e^{-\frac{1}{2a^{2}}y^{2}} dy From a physic point of view it is very important that the integral is from -L/2+\kappa a^{2} and not from -\infty. I...