Aineistot 1-2 / 2
On Kreǐn's extension theory of non-negative operators
(Vaasan yliopisto, 2002)
The famous M.G. Kreın’s extension theory of nonnegative operators is being presented in elementary terms, building on the completion of nonnegative operator blocks. The present treatment includes the reﬁnements to the ...
Boundary relations and their Weyl families
(Vaasan yliopisto, 2004)