The improved Berezin-Li-Yau inequality and Kröger inequality and consequences
摘要
We provide quantitative improvements to the Berezin-Li-Yau inequality and the Kröger inequality, in ℝn, n ⩾ 2. The improvement on the Kröger inequality resolves an open question raised by Weidl from 2006. The improvements allow us to show that for any open bounded domains, there are infinitely many Dirichlet eigenvalues satisfying Pólya’s conjecture if n ⩾ 3, and infinitely many Neumann eigenvalues satisfying Pólya’s conjecture if n ⩾ 5 and the Neumann spectrum is discrete.