Let r and n be natural numbers. For n ≥ 2 all natural operators transforming vector fields on n-manifolds M to 1-forms on are classified. For n ≥ 3 all natural operators transforming vector fields on n-manifolds M to 2-forms on are completely described.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-cm93-1-6,
author = {W. M. Mikulski},
title = {The natural operators $T\_{|M fn} \textasciitilde\ T*T^{r*}$ and $T\_{|M fn} \textasciitilde\ L2T*T^{r*}$
},
journal = {Colloquium Mathematicae},
volume = {91},
year = {2002},
pages = {55-65},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm93-1-6}
}
W. M. Mikulski. The natural operators $T_{|ℳ fₙ} ⇝ T*T^{r*}$ and $T_{|ℳ fₙ} ⇝ Λ²T*T^{r*}$
. Colloquium Mathematicae, Tome 91 (2002) pp. 55-65. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm93-1-6/