Constructing both lower and upper bounds for the eigenvalues of elliptic operators by nonconforming finite element methods

Jun Hu, Yunqing Huang, Quan Shen. Constructing both lower and upper bounds for the eigenvalues of elliptic operators by nonconforming finite element methods. Numerische Mathematik, 131(2):273-302, 2015. [doi]

Abstract

Abstract is missing.