³ . -

г 2006
66
, ˲
̲ ˲ в IJ
' $$ u_t+\sumim a_{i}(x,y,t) u_{y_i} -\sumij (a_{i}(x,y,t) u_{x_i})_{x_j} +\sumi b_i(x,y,t) u_{x_i}+ b_0(x,y,t,u) +\int\limits_0^t a_0(x,y,\xi,u) d\xi =f_0(x,y,t)-\sumi f_{i,x_i}(x,y,t) $$ $x$.
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