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Results tagged with existence-theorems
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user 21907
5
votes
Minimal assumptions for existence of solutions of First order PDE
There are two a priori different points of view. The first one is the Lagrangean where you look at the ODE
$$
\dot x(t)=X(x(t)),
$$
where $X$ is your given vector field. Then, as you mention, a local …
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