4 papers
Boundary quadruples and bijective realisations of abstract Friedrichs operators
Sandeep Kumar Soni
The theory of boundary quadruples and boundary triples is well-studied for symmetric and skew-symmetric operators and in general for dual-pairs. This paper adapts a suitable versio…
m-Accretive Extensions of Friedrichs Operators
Krešimir Burazin, Marko Erceg, Sandeep Kumar Soni
The introduction of abstract Friedrichs operators in 2007-an operator-theoretic framework for studying classical Friedrichs operators has led to significant developments in the fie…
Friedrichs systems on an interval
Marko Erceg, Sandeep Kumar Soni
There has been significant developments in the classification of boundary conditions of positive symmetric systems, also known as Friedrichs systems, after the introduction of oper…
The von Neumann extension theory for abstract Friedrichs operators
Marko Erceg, Sandeep Kumar Soni
The theory of abstract Friedrichs operators was introduced some fifteen years ago with the aim of providing a more comprehensive framework for the study of positive symmetric syste…