We study naturality of the Euler and Helmholtz operators arising in the variational calculus in fibered manifolds with oriented bases.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-cm105-2-1,
author = {J. Kurek and W. M. Mikulski},
title = {The Euler and Helmholtz operators on fibered manifolds with oriented bases},
journal = {Colloquium Mathematicae},
volume = {106},
year = {2006},
pages = {171-177},
zbl = {1095.58002},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm105-2-1}
}
J. Kurek; W. M. Mikulski. The Euler and Helmholtz operators on fibered manifolds with oriented bases. Colloquium Mathematicae, Tome 106 (2006) pp. 171-177. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm105-2-1/