Il problema di Saint Venant: differenze tra le versioni

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Riga 33:
\frac{\delta \sigma_{x}}{\delta x}+\frac{\delta \tau_{xy}}{\delta y}+\frac{\delta \tau_{xz}}{\delta z}=0 \\
\frac{\delta \tau_{xy}}{\delta x}+\frac{\delta \sigma_{y}}{\delta y}+\frac{\delta \tau_{yz}}{\delta z}=0 \\
\frac{\delta \tau_{xz}}{\delta zx}+\frac{\delta \tau_{yz}}{\delta y}+\frac{\delta \sigma_{z}}{\delta z}=0
\end{cases}</math>