SymmetryReduce[eq, ig]
yields the reduction of differential equation(s) eq with respect to the symmetry given by the infinitesimal generator ig. The result is a list {simV, simSol, redEq} where simV is the similarity variable(s), simSol the similarity solution(s) and redEq the reduced equation.
  • The new similarity variables are denoted by the symbol and i.
  • simV and simSol are lists of substitution rules.