Dacorogna, BernardKneuss, OlivierNeves, Wladimir2017-05-302017-05-302017-05-30201710.1515/ans-2017-0007https://infoscience.epfl.ch/handle/20.500.14299/137894WOS:000400674600005Given the contact forms f and g, and the 1-form h, we discuss the existence of a vector field u verifying L-u(f)= d(u (right perpendicular) f)+ u (right perpendicular) df = h. This is closely related to the pullback equation, where we seek for a diffeomorphism phi satisfying phi* (f) = g.Lie DerivativePullback EquationContact Formstext::journal::journal article::research article