Under some weak assumptions on a bundle functor $F:FM_{m,n}\rightarrow FM$ we prove that there is no $FM_{m,n}$-natural operator transforming connections on $Y\rightarrow M$ into connections on $FY\rightarrow Y$.
@article{107930, author = {W\l odzimierz M. Mikulski}, title = {Non-existence of natural operators transforming connections on $Y \to M$ into connections on $FY\to Y$}, journal = {Archivum Mathematicum}, volume = {041}, year = {2005}, pages = {1-4}, zbl = {1112.58006}, mrnumber = {2142138}, language = {en}, url = {http://dml.mathdoc.fr/item/107930} }
Mikulski, Włodzimierz M. Non-existence of natural operators transforming connections on $Y \to M$ into connections on $FY\to Y$. Archivum Mathematicum, Tome 041 (2005) pp. 1-4. http://gdmltest.u-ga.fr/item/107930/
Natural Operations in Differential Geometry, Springer-Verlag, Berlin 1993. | MR 1202431