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| Hi, my problem is as follows? Define $F(q,\lambda)$ as $$F(q,\lambda):=\lim\limits_{z\rightarrow 0}\left (\sum_{i=1/2}^\infty \ln [1+z^{-1}q^{i}\exp({-i^{2} \lambda})][1+zq^{i}\exp({i^{2} \lambda})]-\ln z\right ) , $$ where the summation... |