@article{MTMT:2406325,
	title = {On suboperators with codimension one domains},
	url = {https://m2.mtmt.hu/api/publication/2406325},
	author = {Sebestyén, Zoltán and Stochel, J},
	doi = {10.1016/j.jmaa.2009.06.062},
	journal-iso = {J MATH ANAL APPL},
	journal = {JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS},
	volume = {360},
	unique-id = {2406325},
	issn = {0022-247X},
	year = {2009},
	eissn = {1096-0813},
	pages = {391-397}
}

@article{MTMT:2385743,
	title = {On products of unbounded operators},
	url = {https://m2.mtmt.hu/api/publication/2385743},
	author = {Sebestyén, Zoltán and Stochel, J},
	doi = {10.1023/A:1024660318703},
	journal-iso = {ACTA MATH HUNG},
	journal = {ACTA MATHEMATICA HUNGARICA},
	volume = {100},
	unique-id = {2385743},
	issn = {0236-5294},
	abstract = {A symmetric operator X̂ is attached to each operator X that leaves the domain of a given positive operator A invariant and makes the product AX symmetric. Some spectral properties of X̂ are derived from those of X and, as a consequence, various conditions ensuring positivity of products of the form AX1 ⋯ Xn are proved. The question of Ω-complete positivity of the mapping p → Ap(X1, . . . , Xn) defined on complex polynomials in n variables is investigated. It is shown that the set Ω is related to the MCIntosh-Pryde joint spectrum of (X1, . . . , Xn) in case all the operators A, X1, . . . , Xn are bounded. Examples illustrating the theme of the paper are included.},
	keywords = {Positive operator; selfadjoint operator; Spectral set; Spectral measure; Spectral commutativity; Complete positivity; Symmetric operator; Product of operators},
	year = {2003},
	eissn = {1588-2632},
	pages = {105-129}
}

@article{MTMT:1340569,
	title = {On Krein-von Neumann and Friedrichs extensions},
	url = {https://m2.mtmt.hu/api/publication/1340569},
	author = {Sikolya, Eszter and Sebestyén, Zoltán},
	journal-iso = {ACTA SCI MATH (SZEGED)},
	journal = {ACTA SCIENTIARUM MATHEMATICARUM (SZEGED)},
	volume = {69},
	unique-id = {1340569},
	issn = {0001-6969},
	year = {2003},
	pages = {323-336},
	orcid-numbers = {Sikolya, Eszter/0000-0003-0636-4326}
}

@article{MTMT:1839283,
	title = {On extremal positive operator extensions},
	url = {https://m2.mtmt.hu/api/publication/1839283},
	author = {Prokaj, Vilmos and Sebestyén, Zoltán},
	journal-iso = {ACTA SCI MATH (SZEGED)},
	journal = {ACTA SCIENTIARUM MATHEMATICARUM (SZEGED)},
	volume = {62},
	unique-id = {1839283},
	issn = {0001-6969},
	year = {1996},
	pages = {485-491},
	orcid-numbers = {Prokaj, Vilmos/0000-0001-6392-9173}
}

@article{MTMT:1839282,
	title = {On Friedrichs extensions of operators},
	url = {https://m2.mtmt.hu/api/publication/1839282},
	author = {Prokaj, Vilmos and Sebestyén, Zoltán},
	journal-iso = {ACTA SCI MATH (SZEGED)},
	journal = {ACTA SCIENTIARUM MATHEMATICARUM (SZEGED)},
	volume = {62},
	unique-id = {1839282},
	issn = {0001-6969},
	year = {1996},
	pages = {243-246},
	orcid-numbers = {Prokaj, Vilmos/0000-0001-6392-9173}
}

@article{MTMT:3079731,
	title = {Operator extensions on Hilbert space},
	url = {https://m2.mtmt.hu/api/publication/3079731},
	author = {Sebestyén, Zoltán},
	journal-iso = {ACTA SCI MATH (SZEGED)},
	journal = {ACTA SCIENTIARUM MATHEMATICARUM (SZEGED)},
	volume = {57},
	unique-id = {3079731},
	issn = {0001-6969},
	year = {1993},
	pages = {233-248}
}

@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}
}

@article{MTMT:3066109,
	title = {RESTRICTIONS OF POSITIVE OPERATORS},
	url = {https://m2.mtmt.hu/api/publication/3066109},
	author = {Sebestyén, Zoltán},
	journal-iso = {ACTA SCI MATH (SZEGED)},
	journal = {ACTA SCIENTIARUM MATHEMATICARUM (SZEGED)},
	volume = {46},
	unique-id = {3066109},
	issn = {0001-6969},
	year = {1983},
	pages = {299-301}
}