Concepedia

On the Friedrichs extension of some block operator matrices

A. Yu. Konstantinov, Reinhard Mennicken

Integral Equations and Operator Theory · 2002 · 19 citations · 5 references

DOI

Concepts

References

5

The Essential Spectrum of Some Matrix Operators

F. V. Atkinson, Heinz Langer, R. Mennicken · Mathematische Nachrichten · 1994 · 205 citations

, , +12

On the essential spectrum of matrix operators

Mathematical Notes · 1995 · 67 citations

, , +13

Systems of Singular Differential Operators of Mixed Order and Applications to 1 ‐ Dimensional MHD Problems

Volker Hardt, Reinhard Mennicken, Serguei Naboko · Mathematische Nachrichten · 1999 · 28 citations

, , +15

The Essential Spectrum of a System of Singular Ordinary Differential Operators of Mixed Order. Part II: The Generalization of Kako's Problem

M. Faierman, Reinhard Mennicken, Manfred Möller · Mathematische Nachrichten · 2000 · 20 citations

, , +8

Spectral theory of some matrix differential operators of mixed order

A. Yu. Konstantinov · Ukrainian Mathematical Journal · 1998 · 11 citations

, , +14