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Sur les solutions analytiques de l'équation $\dfrac{\partial^2u}{\partial x\partial y}=f\biggl(x,y,u,\dfrac{\partial u}{\partial x}\,, \dfrac{\partial u}{\partial y}\,,\dfrac{\partial^2 u}{\partial x^2}\,,\dfrac{\partial^2 u}{\partial y^2}\biggr)$

N. Günther

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