Bernhard Riemann 1861 revisited: existence of flat coordinates for an arbitrary bilinear form

Autor: Bandyopadhyay, S., Dacorogna, B., Matveev, V. S., Troyanov, M.
Rok vydání: 2021
Předmět:
Zdroj: Mathematische Zeitschrift (2023) 305:12
Druh dokumentu: Working Paper
DOI: 10.1007/s00209-023-03335-1
Popis: We generalize the celebrated results of Bernhard Riemann and Gaston Darboux: we give necessary and sufficient conditions for a bilinear form to be flat. More precisely, we give explicit necessary and sufficient conditions for a tensor field of type (0,2) which is not necessary symmetric or skew-symmetric, and is possibly degenerate, to have constant entries in a local coordinate system.
Comment: 27 pages
Databáze: arXiv