TY  - JOUR
AU  - Sebestyén, Zoltán
AU  - Tarcsay, Zsigmond
TI  - Characterizations of essentially self-adjoint and skew-adjoint operators
JF  - STUDIA SCIENTIARUM MATHEMATICARUM HUNGARICA
J2  - STUD SCI MATH HUNG
VL  - 52
PY  - 2015
IS  - 3
SP  - 371
EP  - 385
PG  - 15
SN  - 0081-6906
DO  - 10.1556/012.2015.52.3.1300
UR  - https://m2.mtmt.hu/api/publication/2969008
ID  - 2969008
N1  - Cited By :8            
            Export Date: 7 September 2022
AB  - An extension of von Neumann's characterization of essentially selfadjoint operators is given among not necessarily densely defined symmetric operators which are assumed to be closable. Our arguments are of algebraic nature and follow the idea of [1]. © 2015 Akadémiai Kiadó, Budapest.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Sebestyén, Zoltán
AU  - Tarcsay, Zsigmond
TI  - T∗T always has a positive selfadjoint extension
JF  - ACTA MATHEMATICA HUNGARICA
J2  - ACTA MATH HUNG
VL  - 135
PY  - 2012
IS  - 1-2
SP  - 116
EP  - 129
PG  - 14
SN  - 0236-5294
DO  - 10.1007/s10474-011-0154-7
UR  - https://m2.mtmt.hu/api/publication/2433949
ID  - 2433949
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Sebestyén, Zoltán
AU  - Stochel, Jan
TI  - Restrictions of positive selfadjoint operators
JF  - ACTA SCIENTIARUM MATHEMATICARUM (SZEGED)
J2  - ACTA SCI MATH (SZEGED)
VL  - 55
PY  - 1991
IS  - 1-2
SP  - 149
EP  - 154
PG  - 6
SN  - 0001-6969
UR  - https://m2.mtmt.hu/api/publication/3079745
ID  - 3079745
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Sebestyén, Zoltán
TI  - ON RANGES OF ADJOINT OPERATORS IN HILBERT-SPACE
JF  - ACTA SCIENTIARUM MATHEMATICARUM (SZEGED)
J2  - ACTA SCI MATH (SZEGED)
VL  - 46
PY  - 1983
IS  - 1-4
SP  - 295
EP  - 298
PG  - 4
SN  - 0001-6969
UR  - https://m2.mtmt.hu/api/publication/3066108
ID  - 3066108
LA  - English
DB  - MTMT
ER  -