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Display information for equation id:math.1515.7 on revision:1515
* Page found: Normalschwingungen (eq math.1515.7)
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TeX (original user input):
\begin{align}
& L=T-V=\frac{1}{2}\left( \sum\limits_{j,k}{{{T}_{jk}}}{{{\dot{q}}}_{j}}{{{\dot{q}}}_{k}}-\sum\limits_{j,k}{{{V}_{jk}}}{{q}_{j}}{{q}_{k}} \right) \\
& \frac{\partial L}{\partial {{{\dot{q}}}_{l}}}=\frac{1}{2}\sum\limits_{j,k}{{{T}_{jk}}}\frac{\partial }{\partial {{{\dot{q}}}_{l}}}\left( {{{\dot{q}}}_{j}}{{{\dot{q}}}_{k}} \right)=\frac{1}{2}\sum\limits_{j,k}{{{T}_{jk}}}\left( {{\delta }_{jl}}{{{\dot{q}}}_{k}}+{{\delta }_{kl}}{{{\dot{q}}}_{j}} \right)=\frac{1}{2}\sum\limits_{j,k}{{{T}_{lk}}}{{{\dot{q}}}_{k}}+{{T}_{lj}}{{{\dot{q}}}_{j}}=\sum\limits_{k}{{{T}_{lk}}}{{{\dot{q}}}_{k}}\quad mit\ {{T}_{jl}}={{T}_{lj}} \\
& \frac{d}{dt}\left( \frac{\partial L}{\partial {{{\dot{q}}}_{l}}} \right)=\sum\limits_{k}{{{T}_{lk}}}{{{\ddot{q}}}_{k}} \\
& \frac{\partial L}{\partial {{q}_{l}}}=-\sum\limits_{k}{{{V}_{lk}}{{q}_{k}}} \\
\end{align}
TeX (checked):
{\begin{aligned}&L=T-V={\frac {1}{2}}\left(\sum \limits _{j,k}{{T}_{jk}}{{\dot {q}}_{j}}{{\dot {q}}_{k}}-\sum \limits _{j,k}{{V}_{jk}}{{q}_{j}}{{q}_{k}}\right)\\&{\frac {\partial L}{\partial {{\dot {q}}_{l}}}}={\frac {1}{2}}\sum \limits _{j,k}{{T}_{jk}}{\frac {\partial }{\partial {{\dot {q}}_{l}}}}\left({{\dot {q}}_{j}}{{\dot {q}}_{k}}\right)={\frac {1}{2}}\sum \limits _{j,k}{{T}_{jk}}\left({{\delta }_{jl}}{{\dot {q}}_{k}}+{{\delta }_{kl}}{{\dot {q}}_{j}}\right)={\frac {1}{2}}\sum \limits _{j,k}{{T}_{lk}}{{\dot {q}}_{k}}+{{T}_{lj}}{{\dot {q}}_{j}}=\sum \limits _{k}{{T}_{lk}}{{\dot {q}}_{k}}\quad mit\ {{T}_{jl}}={{T}_{lj}}\\&{\frac {d}{dt}}\left({\frac {\partial L}{\partial {{\dot {q}}_{l}}}}\right)=\sum \limits _{k}{{T}_{lk}}{{\ddot {q}}_{k}}\\&{\frac {\partial L}{\partial {{q}_{l}}}}=-\sum \limits _{k}{{{V}_{lk}}{{q}_{k}}}\\\end{aligned}}
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