Titlebook: Mathematical Challenges of Zero-Range Physics; Models, Methods, Rig Alessandro Michelangeli Conference proceedings 2021 The Editor(s) (if a

禁令

A Note on the Dirac Operator with Kirchoff-Type Vertex Conditions on Metric Graphs,In this note we present some properties of the Dirac operator on noncompact metric graphs with . vertex conditions. In particular, we discuss its spectral features and describe the associated quadratic form.

commute

COM

,Kreı̆n-Višik-Birman Self-Adjoint Extension Theory Revisited,The core results of the Kreı̆n-Višik-Birman theory of self-adjoint extensions of semi-bounded symmetric operators are reproduced, both in their original and in a more modern formulation, with a comprehensive discussion that includes missing details, elucidative steps, and intermediate results of independent interest.

muster

灌输

Springer INdAM Serieshttp://image.papertrans.cn/m/image/626040.jpg

鸽子

978-3-030-60455-4The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerl

两栖动物

Palliation

Spectral Isoperimetric Inequality for the ,-Interaction on a Contour,on of a fixed strength, the support of which is a ..-smooth contour. Under the constraint of a fixed length of the contour, we prove that the lowest eigenvalue is maximized by the circle. The proof relies on the min-max principle and the method of parallel coordinates.

Hangar

MAG