| Publication | Date of Publication | Type |
|---|
| Reduction of positive self-adjoint extensions | 2024-04-11 | Paper |
| Extensions of positive symmetric operators and Krein's uniqueness criteria | 2022-09-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5074167 | 2022-05-09 | Paper |
| Canonical graph contractions of linear relations on Hilbert spaces | 2021-05-28 | Paper |
| Range-kernel characterizations of operators which are adjoint of each other | 2020-07-27 | Paper |
| Canonical graph contractions of linear relations on Hilbert spaces | 2020-07-02 | Paper |
| On the adjoint of Hilbert space operators | 2019-02-18 | Paper |
| Lebesgue type decompositions for linear relations and Ando’s uniqueness criterion | 2019-02-01 | Paper |
| On the square root of a positive selfadjoint operator | 2018-03-16 | Paper |
| A characterization of positive normal functionals on the full operator algebra | 2017-10-18 | Paper |
| Adjoint of sums and products of operators in Hilbert spaces | 2017-03-31 | Paper |
| Characterizations of essentially self-adjoint and skew-adjoint operators | 2017-03-31 | Paper |
| On the sum between a closable operator $T$ and a $T$-bounded operator | 2016-11-25 | Paper |
| Operators having selfadjoint squares | 2016-11-25 | Paper |
| A short-type decomposition of forms | 2016-06-23 | Paper |
| On the uniqueness of the Lebesgue decomposition of normal states on $B(H)$ | 2015-07-21 | Paper |
| Extensions of positive operators and functionals | 2015-02-27 | Paper |
| On operators which are adjoint to each other | 2015-01-08 | Paper |
| A reversed von Neumann theorem | 2015-01-07 | Paper |
| Characterizations of selfadjoint operators | 2014-03-17 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5402867 | 2014-03-17 | Paper |
| On operator factorization of linear relations | 2014-01-29 | Paper |
| Parallel subtraction of nonnegative forms | 2013-11-07 | Paper |
| Erratum to: ``Complement of forms | 2013-09-19 | Paper |
| A Radon-Nikodym type theorem for forms | 2013-09-19 | Paper |
| Complement of forms | 2013-06-28 | Paper |
| Factorizations of linear relations | 2013-01-16 | Paper |
| \(T^*T\) always has a positive selfadjoint extension | 2013-01-02 | Paper |
| Biorthogonal expansions for symmetrizable operators | 2011-12-19 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3560684 | 2010-05-14 | Paper |
| Dynamic model and simulation analysis of the genetic impact of population harvesting | 2010-04-14 | Paper |
| Lebesgue type decompositions for nonnegative forms | 2009-12-18 | Paper |
| On the generalized derivation induced by two projections | 2009-11-23 | Paper |
| On suboperators with codimension one domains | 2009-11-06 | Paper |
| A canonical decomposition for linear operators and linear relations | 2007-11-12 | Paper |
| Characterizations of positive selfadjoint extensions | 2007-03-07 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3416484 | 2007-01-22 | Paper |
| On the nonnegativity of operator products | 2006-10-05 | Paper |
| POSITIVE DEFINITE FUNCTIONS AND SEBESTYÉN'S OPERATOR MOMENT PROBLEM | 2006-03-13 | Paper |
| A local lifting theorem for subnormal operators | 2006-03-08 | Paper |
| Reflection symmetry and symmetrizability of Hilbert space operators | 2005-03-01 | Paper |
| On products of unbounded operators | 2004-09-07 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4815653 | 2004-09-07 | Paper |
| Sebestyén moment problem: The multi-dimensional case | 2004-02-12 | Paper |
| A seminorm with square property on a complex associative algebra is submultiplicative | 2002-04-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2754616 | 2002-02-21 | Paper |
| https://portal.mardi4nfdi.de/entity/Q2707212 | 2001-04-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4938005 | 2000-02-21 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4231622 | 1999-03-14 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4371264 | 1998-01-11 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4714577 | 1997-05-20 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4877587 | 1996-05-14 | Paper |
| Lifting intertwining operators | 1996-01-08 | Paper |
| Anticommutant Lifting and Anticommuting Dilation | 1995-06-12 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4277411 | 1995-03-15 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4283129 | 1994-10-31 | Paper |
| Restrictions of partial isometries. II | 1993-02-08 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4291331 | 1993-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4013127 | 1992-09-27 | Paper |
| Restrictions of partial isometries | 1992-06-28 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3984112 | 1992-06-27 | Paper |
| A general saddle point theorem and its applications | 1992-06-25 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3811232 | 1991-01-01 | Paper |
| Characterization of subprojection suboperators | 1990-01-01 | Paper |
| A proof of Parrott's theorem on quotient norms | 1989-01-01 | Paper |
| Extremal positive and self-adjoint extensions of suboperators | 1989-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3797764 | 1988-01-01 | Paper |
| Operator moment theorems for C *-algebras | 1987-01-01 | Paper |
| States and\( ^ *\)-representations. I | 1986-01-01 | Paper |
| A moment theorem for contractions on Hilbert spaces | 1986-01-01 | Paper |
| An elementary minimax inequality | 1986-01-01 | Paper |
| On the existence of certain semi-bounded self-adjoint operators in Hilbert space | 1986-01-01 | Paper |
| States and *-representations. II | 1986-01-01 | Paper |
| On the Definition of C*-Algebras II | 1985-01-01 | Paper |
| Dilatable operator valued functions on \(C^*\)-algebras | 1984-01-01 | Paper |
| On representability of linear functionals on *-algebras | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3683023 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3701986 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3730492 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3730493 | 1984-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5185582 | 1984-01-01 | Paper |
| A moment problem with respect to \(C^*\)-algebras | 1983-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3331785 | 1983-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3336243 | 1983-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3344729 | 1983-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3344730 | 1983-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4741044 | 1982-01-01 | Paper |
| Every \(C^*\)-seminorm is automatically submultiplicative | 1979-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q3857319 | 1978-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4118333 | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4126905 | 1976-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4094000 | 1975-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q4059454 | 1974-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5179948 | 1973-01-01 | Paper |
| https://portal.mardi4nfdi.de/entity/Q5579293 | 1969-01-01 | Paper |
