Seppo Hassi

Seppo Hassi
Professor
University of Vaasa / School of Technology and Innovations / Mathematics

Contact

Seppo.Hassi [at] uwasa.fi
+358294498279
Fabriikki F482

Introduction

For a further personal home page see:

http://lipas.uwasa.fi/~sha/

Publications

Publication year Publication Authors
2001 Singular perturbations of selfadjoint operators and their operator models Derkach Vladimir;Hassi Seppo;de Snoo Henk
2001 On the class of extremal extensions of a nonnegative operator Arlinskii Yu.M.;Hassi Seppo;Sebestyen Z.;de Snoo Henk
2001 Weyl functions and intermediate extensions of symmetric operators Derkach Vladimir;Hassi Seppo;Malamud Mark;de Snoo Henk
2001 On commutative and noncommutative representations of matrix-valued Herglotz-Nevanlinna functions Hassi Seppo;de Snoo Henk;Tsekanovskii Eduard
2001 Generalized Nevanlinna functions with polynomial asymptotic behaviour at infinity and regular perturbations Derkach Vladimir;Hassi Seppo;de Snoo Henk