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发表于 2019-2-16 15:08:35
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\[ E(u+v,\color{gray}{k})=E(u,\color{gray}{k})+E(v,\color{gray}{k})-{\color{gray}{k}}^2\operatorname{sn}(u,\color{gray}{k})\operatorname{sn}(v,\color{gray}{k})\operatorname{sn}(u+v,\color{gray}{k}) \]
\[ \Pi(\color{gray}{n},u+v,\color{gray}{k})=\Pi(\color{gray}{n},u,\color{gray}{k})+\Pi(\color{gray}{n},v,\color{gray}{k})-\frac{1}{2}\ln\frac{1+{\color{gray}{k}}^2\operatorname{sn}(\color{gray}{n},\color{gray}{k})\operatorname{sn}(u,\color{gray}{k})\operatorname{sn}(u+v+a,\color{gray}{k})}{1-{\color{gray}{k}}^2\operatorname{sn}(\color{gray}{n},\color{gray}{k})\operatorname{sn}(u,\color{gray}{k})\operatorname{sn}(u+v-a,\color{gray}{k})} \] |
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