Geodesic
The fundamental group and the spectrum of the Laplacian.
Commentarii mathematici Helvetici, Tome 56 (1981), pp. 581-598

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Zbl
Mots-clés : fundamental group, spectrum of Laplacian, Laplace-Beltrami operator, lowest eigenvalue, universal cover, compact Riemannian manifold, amenable fundamental group 
Robert Brooks. The fundamental group and the spectrum of the Laplacian.. Commentarii mathematici Helvetici, Tome 56 (1981), pp. 581-598. http://geodesic.mathdoc.fr/item/CMH_1981__56_139885/
@article{CMH_1981__56_139885,
     author = {Robert Brooks},
     title = {The fundamental group and the spectrum of the {Laplacian.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {581--598},
     year = {1981},
     volume = {56},
     zbl = {0495.58029},
     url = {http://geodesic.mathdoc.fr/item/CMH_1981__56_139885/}
}
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