Lieb-Thirring Inequalities for Fourth-Order Operators in Low Dimensions

Details Lieb-Thirring Inequalities for Fourth-Order Operators in Low Dimensions Lieb-Thirring Inequalities for Fourth-Order Operators in Low Dimensions

2008-11-02

arxiv.org/abs/0811.0189v2

Mathematics

Spectral Theory

Scientific paper

This paper considers Lieb-Thirring inequalities for higher order differential operators. A result for general fourth-order operators on the half-line is developed, and the trace inequality tr((-Delta)^2 - C^{HR}_{d,2} / (|x|^4) - V(x))^{-\gamma} < C_\gamma \int_{R^d} V(x)_+^{\gamma + d/4} dx for gamma \geq 1 - d/4, where C^{HR}_{d,2} is the sharp constant in the Hardy-Rellich inequality and where C_\gamma > 0 is independent of V, is proved for dimensions d = 1,3. As a corollary of this inequality a Sobolev-type inequality is obtained.

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