Operators and Matrices · Volume 8, Issue 1 Spectral estimates for Dirichlet Laplacians on perturbed twisted tubes 08-09 Pages 167-183 DOI 10.7153/oam-08-09 Downloads Short PDF Full PDF PNG Authors Pavel Exner Diana Barseghyan Keywords Dirichlet Laplacian twisted tube discrete spectrum eigenvalue estimates Subject classes 81Q37 35P15 81Q10