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Partial differential equations (PDEs): Existence and uniqueness, regularity, boundary conditions, linear and non-linear operators, stability, soliton theory, integrable PDEs, conservation laws, qualitative dynamics.
2
votes
2
answers
565
views
smoothness of solution for second order elliptic problem
Hello all,
could someone point me to a reference that ties the smoothness of the solution $u$ to the classical elliptic problem
$\nabla \cdot ( q \nabla u ) = f \;,\; x \in \Omega$
$u = g \;,\; x …
3
votes
1
answer
2k
views
Existence of solution for Poisson problem with pure Neumann BCs
Hello all,
Does the following boundary value problem admit unique solutions $q$:
$- \Delta q + \beta q = f$, $x \in \Omega$
$ \nabla q \cdot \vec{n} = g $, $x \in \Gamma := \partial \Omega$,
wher …