Semenov E. I.
          Multidimensional exact solutions to a quasilinear parabolic 
          equation with anisotropic heat conductivity
        We prove invariance of a quasilinear parabolic equation with anisotropic 
          heat conductivity in the three-dimensional coordinate space under some 
          equivalence transformations and present some explicit formulas for these 
          transformations. We consider nontrivial reductions of the equation to 
          similar equations of less spatial dimension. Using these results, we 
          construct new exact multidimensional solutions to the equation which 
          depend on arbitrary harmonic functions.