As briefly mentioned at the beginning of the previous chapter, typical geometric applications of Theorem 4.5 are obtained by applying it when the function ψ is the norm of the section of a suitable vector bundle. In appropriate circumstances, the theorem guarantees that certain vector subspaces of such sections are trivial, the main geometric assumption being the existence of a positive solution ϕ of the differential inequality (Formula presented) where a(x) is a lower bound for the relevant curvature term. According to Lemma 3.10 this amounts to requiring that the bottom of the spectrum of the Schrödinger operator −Δ − Ha(x) is non-negative.
CITATION STYLE
A finite-dimensionality result. (2008). In Progress in Mathematics (Vol. 266, pp. 103–126). Springer Basel. https://doi.org/10.1007/978-3-7643-8642-9_5
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