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A well-known result by L. Markus, later extended by D. A. Neumann, states that two continuous flows on a surface are equivalent if and only if there is a surface homeomorphism preserving orbits and time directions of their separatrix configurations.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9fda864c7cc568b00760beccfd283765
