We give a characterization of constant coefficients elliptic operators in terms of estimates of their iterations on smooth functions.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-ap111-2-3, author = {Grzegorz \L ysik and Pawe\l\ M. W\'ojcicki}, title = {A characterization of elliptic operators}, journal = {Annales Polonici Mathematici}, volume = {111}, year = {2014}, pages = {145-148}, zbl = {1300.35025}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ap111-2-3} }
Grzegorz Łysik; Paweł M. Wójcicki. A characterization of elliptic operators. Annales Polonici Mathematici, Tome 111 (2014) pp. 145-148. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ap111-2-3/