E-viri
PDF
Recenzirano
Odprti dostop
-
Csató, G.; Dacorogna, B.; Kneuss, O.
Calculus of variations and partial differential equations, 2014/1, Letnik: 49, Številka: 1-2Journal Article
Let be two closed -forms over The pullback equation studies the existence of a diffeomorphism such that We prove two types of results. The first one sharpens some of the existing regularity results. The second one discusses the possibility of choosing the map as the gradient of a function We show that this is a very rare event unless the two forms are constant.
