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most citedLyapunov coefficients for monodromic tangential singularities in Filippov vector fields

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math.DS2021★ 3 cited

On the non-existence of isochronous tangential centers in Filippov vector fields

Douglas D. Novaes, Leandro A. Silva

The isochronicity problem is a classical problem in the qualitative theory of planar vector fields which consists in characterizing whether a center is isochronous or not, that is,…