First Laplace eigenvalue of strongly isotropy irreducible spaces
Authors
Emilio A. Lauret
Fiorela Rossi Bertone
Alejandro Tolcachier
Abstract
We study the smallest positive eigenvalue $λ_1$ of the Laplace-Beltrami operator associated with any compact strongly isotropy irreducible space. We provide an explicit expression for all simply connected cases. Furthermore, every strongly isotropy irreducible space is automatically an Einstein manifold, and we prove for each of them that $E<λ_1\leq 16E$, where $E$ denotes the corresponding Einstein constant.
