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On Lie's classification of subalgebras of vector fields on the plane. (arXiv:2012.01422v1 [math.RT]) http://arxiv.org/abs/2012.01422
On Lie's classification of subalgebras of vector fields on the plane. (arXiv:2012.01422v1 [math.RT]) http://arxiv.org/abs/2012.01422