TY  - BOOK
AU  - Borthwick, David
TI  - Spectral Theory : Basic Concepts and Applications 
SN  -  9783030380045, 3030380041
AV  - QA 320 B67 2020
PY  - 2020///
CY  - Switzerland
PB  - SPRINGER, [S.l.], 
KW  - Dirichlet Laplacian operator
KW  - operators on graphs
KW  - Schrödinger operators
KW  - spectral theory of Riemannian manifolds
N1  - includes references and index
ER  -