Non-classical symmetry reduction: example of the Boussinesq equation
作者： D Levi , P Winternitz
DOI: 10.1088/0305-4470/22/15/010
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摘要: A symmetry of an equation will leave the set of all solutions invariant. A'conditional symmetry'will leave only a subset of solutions, defined by some differential condition, invariant. The …
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