Abstract
AbstractWe prove the existence of nonnegative variational solutions to the obstacle problem associated with the degenerate doubly nonlinear equation $$\begin{aligned} \partial _t b(u) - {{\,\mathrm{div}\,}}(Df(Du)) = 0, \end{aligned}$$
∂
t
b
(
u
)
-
div
(
D
f
(
D
u
)
)
=
0
,
where the nonlinearity $$b :\mathbb {R}_{\ge 0} \rightarrow \mathbb {R}_{\ge 0}$$
b
:
R
≥
0
→
R
≥
0
is increasing, piecewise $$C^1$$
C
1
and satisfies a polynomial growth condition. The prototype is $$b(u) := u^m$$
b
(
u
)
:
=
u
m
with $$m \in (0,1)$$
m
∈
(
0
,
1
)
. Further, $$f :\mathbb {R}^n \rightarrow \mathbb {R}_{\ge 0}$$
f
:
R
n
→
R
≥
0
is convex and fulfills a standard p-growth condition. The proof relies on a nonlinear version of the method of minimizing movements.
Funder
Studienstiftung des Deutschen Volkes
Publisher
Springer Science and Business Media LLC
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