For natural numbers $r$ and $n\geq 2$ all natural operators $T_{\vert \Cal M f_n}\rightsquigarrow T^* (J^rT^{*})$ transforming vector fields from $n$-manifolds $M$ into $1$-forms on $J^r T^{*}M=\{j^r_x (\omega)\mid \omega \in \Omega^1(M), x\in M\}$ are classified. A similar problem with fibered manifolds instead of manifolds is discussed.
@article{119346, author = {W\l odzimierz M. Mikulski}, title = {Liftings of vector fields to $1$-forms on the $r$-jet prolongation of the cotangent bundle}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {43}, year = {2002}, pages = {565-573}, zbl = {1090.58005}, mrnumber = {1920532}, language = {en}, url = {http://dml.mathdoc.fr/item/119346} }
Mikulski, Włodzimierz M. Liftings of vector fields to $1$-forms on the $r$-jet prolongation of the cotangent bundle. Commentationes Mathematicae Universitatis Carolinae, Tome 43 (2002) pp. 565-573. http://gdmltest.u-ga.fr/item/119346/
Liftings of tensor fields to the cotangent bundles, Proc. Conf. Differential Geom. and Appl., Brno, 1995, pp.141-150. | MR 1406334
Natural Operations in Differential Geometry, Springer Verlag, Berlin, 1993. | MR 1202431
The natural operators lifting $1$-forms to some vector bundle functors, Colloq. Math. (2002), to appear. | MR 1930803 | Zbl 1020.58003
The natural operators $T_{\vert \Cal M f_n} \rightsquigarrow T^* T^{r*}$ and $T_{\vert \Cal M f_n}\rightsquigarrow \Lambda^2 T^*T^{r*}$, Colloq. Math. (2002), to appear. | MR 1930256
Liftings of $1$-forms to the bundle of affinors, Ann. UMCS Lublin (LV)(A) (2001), 109-113. (2001) | MR 1845255 | Zbl 1020.58005