Abstract
AbstractSplitting-type variational problems $$\begin{aligned} \int _{\Omega }\sum _{i=1}^n f_i(\partial _i w) \, \textrm{d}x\rightarrow \min \end{aligned}$$
∫
Ω
∑
i
=
1
n
f
i
(
∂
i
w
)
d
x
→
min
with superlinear growth conditions are studied by assuming $$\begin{aligned} h_i(t) \le f''_i(t) \le H_i(t) \qquad (*) \end{aligned}$$
h
i
(
t
)
≤
f
i
′
′
(
t
)
≤
H
i
(
t
)
(
∗
)
with suitable functions $$h_i$$
h
i
, $$H_i$$
H
i
: $$\mathbb {R}\rightarrow \mathbb {R}^+$$
R
→
R
+
, $$i=1$$
i
=
1
, ..., n, measuring the growth and ellipticity of the energy density. Here, as the main feature, we do not impose a symmetric behaviour like $$h_i(t)\approx h_i(-t)$$
h
i
(
t
)
≈
h
i
(
-
t
)
and $$H_i(t) \approx H_i(-t)$$
H
i
(
t
)
≈
H
i
(
-
t
)
for large |t|. Assuming quite weak hypotheses on the functions appearing in $$(*)$$
(
∗
)
, we establish higher integrability of $$|\nabla u|$$
|
∇
u
|
for local minimizers $$u\in L^\infty (\Omega )$$
u
∈
L
∞
(
Ω
)
by using a Caccioppoli-type inequality with some power weights of negative exponent.
Funder
Universität des Saarlandes
Publisher
Springer Science and Business Media LLC
Reference15 articles.
1. Giaquinta, M.: Growth conditions and regularity, a counterexample. Manuscripta Math. 59(2), 245–248 (1987)
2. Marcellini, P.: Regularity of minimizers of integrals of the calculus of variations with nonstandard growth conditions. Arch. Ration. Mech. Anal. 3, 267–284 (1989)
3. Marcellini, P.: Everywhere regularity for a class of elliptic systems without growth conditions. Ann. Scuola Norm. Sup. Pisa Cl. Sci. (4) 23(11), 1–5 (1996)
4. Acerbi, E., Fusco, N.: Partial regularity under anisotropic (p, q) growth conditions. J. Differ. Equ. 107(1), 46–67 (1994)
5. Fusco, N., Sbordone, C.: Some remarks on the regularity of minima of anisotropic integrals. Comm. Partial Differ. Equ. 18(1–2), 153–167 (1993)