@article{JEDP_1977____157_0,
author = {Menikoff, A. and Sj\"ostrand, Johannes},
title = {The eigenvalues of hypoelliptic operators},
journal = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
year = {1977},
pages = {157-163},
language = {en},
url = {http://dml.mathdoc.fr/item/JEDP_1977____157_0}
}
Menikoff, A.; Sjöstrand, Johannes. The eigenvalues of hypoelliptic operators. Journées équations aux dérivées partielles, (1977), pp. 157-163. http://gdmltest.u-ga.fr/item/JEDP_1977____157_0/
[1] and . On the asymptotic behavior of the spectral functions and resolvent kernels of elliptic operators. Israel J. Math. 5 (1967) 1-30. | MR 36 #1814 | Zbl 0148.13003
[2] , and . In this volume.
[3] and . On a classe of pseudo-differential operators with double characteristics. Invent. Math. 24 (1974) 1-34. | MR 50 #5550 | Zbl 0281.35083
[4] . The spectral function of an elliptic operator. Acta Math. 121 (1968) 193-218. | MR 58 #29418 | Zbl 0164.13201
[5] . Lower bounds for pseudo-differential operators. Ark. Mat. 9 (1971) 117-140. | MR 48 #6735 | Zbl 0211.17102
[6] and . Fourier integral operators with complex-valued phase functions. Springer L.N. 459, 255-282. | Zbl 0306.42007
[7] . Fonction spectrale et valeurs propres d'une classe d'opérateurs non elliptiques. Comm. PDE 1 (1976) 467-519. | MR 55 #888 | Zbl 0376.35012
[8] . Complex powers of an elliptic operator. AMS Proc. Symp. in Pure Math. 10 (1967) 288-307. | MR 38 #6220 | Zbl 0159.15504
[9] . Parametrices for pseudodifferential operators with multiple characteristics. Ark. Mat. 12 (1974) 85-130. | MR 50 #5236 | Zbl 0317.35076