We determine all natural functions on $T^*T^{(r)} $ and $T^*T^{r*}$.
@article{107519, author = {W\l odzimierz M. Mikulski}, title = {Natural functions on $T\sp *T\sp {(r)}$ and $T\sp *T\sp {r\ast}$}, journal = {Archivum Mathematicum}, volume = {031}, year = {1995}, pages = {1-7}, zbl = {0837.53021}, mrnumber = {1342370}, language = {en}, url = {http://dml.mathdoc.fr/item/107519} }
Mikulski, Włodzimierz M. Natural functions on $T\sp *T\sp {(r)}$ and $T\sp *T\sp {r\ast}$. Archivum Mathematicum, Tome 031 (1995) pp. 1-7. http://gdmltest.u-ga.fr/item/107519/
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