@article{MTMT:2969008,
	title = {Characterizations of essentially self-adjoint and skew-adjoint operators},
	url = {https://m2.mtmt.hu/api/publication/2969008},
	author = {Sebestyén, Zoltán and Tarcsay, Zsigmond},
	doi = {10.1556/012.2015.52.3.1300},
	journal-iso = {STUD SCI MATH HUNG},
	journal = {STUDIA SCIENTIARUM MATHEMATICARUM HUNGARICA},
	volume = {52},
	unique-id = {2969008},
	issn = {0081-6906},
	abstract = {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.},
	keywords = {Symmetric operators; Skewadjoint operators; Skew-symmetric operators; Essentially selfadjoint operators},
	year = {2015},
	eissn = {1588-2896},
	pages = {371-385},
	orcid-numbers = {Tarcsay, Zsigmond/0000-0001-8102-5055}
}

@article{MTMT:2433949,
	title = {T∗T always has a positive selfadjoint extension},
	url = {https://m2.mtmt.hu/api/publication/2433949},
	author = {Sebestyén, Zoltán and Tarcsay, Zsigmond},
	doi = {10.1007/s10474-011-0154-7},
	journal-iso = {ACTA MATH HUNG},
	journal = {ACTA MATHEMATICA HUNGARICA},
	volume = {135},
	unique-id = {2433949},
	issn = {0236-5294},
	keywords = {Positive operator; selfadjoint operator; closable operator; operator extension; Krein-von Neumann extension; Friedrichs extension},
	year = {2012},
	eissn = {1588-2632},
	pages = {116-129},
	orcid-numbers = {Tarcsay, Zsigmond/0000-0001-8102-5055}
}

@article{MTMT:3079745,
	title = {Restrictions of positive selfadjoint operators},
	url = {https://m2.mtmt.hu/api/publication/3079745},
	author = {Sebestyén, Zoltán and Stochel, Jan},
	journal-iso = {ACTA SCI MATH (SZEGED)},
	journal = {ACTA SCIENTIARUM MATHEMATICARUM (SZEGED)},
	volume = {55},
	unique-id = {3079745},
	issn = {0001-6969},
	year = {1991},
	pages = {149-154}
}

@article{MTMT:3066108,
	title = {ON RANGES OF ADJOINT OPERATORS IN HILBERT-SPACE},
	url = {https://m2.mtmt.hu/api/publication/3066108},
	author = {Sebestyén, Zoltán},
	journal-iso = {ACTA SCI MATH (SZEGED)},
	journal = {ACTA SCIENTIARUM MATHEMATICARUM (SZEGED)},
	volume = {46},
	unique-id = {3066108},
	issn = {0001-6969},
	year = {1983},
	pages = {295-298}
}