Criteria for the discreteness of the spectrum of a hypoelliptic operator
Matematičeskie zametki, Tome 30 (1981) no. 5, pp. 685-693
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@article{MZM_1981_30_5_a5,
author = {M. G. Gimadislamov},
title = {Criteria for the discreteness of the spectrum of a hypoelliptic operator},
journal = {Matemati\v{c}eskie zametki},
pages = {685--693},
publisher = {mathdoc},
volume = {30},
number = {5},
year = {1981},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/MZM_1981_30_5_a5/}
}
M. G. Gimadislamov. Criteria for the discreteness of the spectrum of a hypoelliptic operator. Matematičeskie zametki, Tome 30 (1981) no. 5, pp. 685-693. http://geodesic.mathdoc.fr/item/MZM_1981_30_5_a5/