³ . -

г 2009
70
,
̲ в
$$ u_{tt} +\sum\limits_{i,j,s,l=1}^{n} (a_{ij}^{sl}(x)u_{x_{i}x_{j}})_{x_{s}x_{l}} -\sum\limits_{i=1}^{n} (a_{i}(x)|u_{x_{i}}|^{q-2} u_{x_{i}})_{x_{i}} + b_{0}(x)u_{t} -$$ $$ -a_{0}(x)|u|^{p-2}u=0 $$ . ' '.
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