@article{MTMT:31725389,
	title = {When is a scaled contraction hypercyclic?},
	url = {https://m2.mtmt.hu/api/publication/31725389},
	author = {Matache, Valentin},
	doi = {10.1007/s40574-020-00260-7},
	journal-iso = {BOLL UNIONE MAT ITAL},
	journal = {BOLLETTINO DELLA UNIONE MATEMATICA ITALIANA},
	unique-id = {31725389},
	issn = {1972-6724},
	abstract = {Hypercyclic operators are operators with dense orbits. A contraction cannot be hypercyclic since its orbits are bounded sets. Nevertheless, by multiplying a contraction with a scalar of absolute value larger than 1, the resulting scaled contraction can occasionally be a hypercyclic operator. In this paper, we investigate which Hilbert space contractions have that property and which don't. We introduce the set Lambda(T) of all scalars which produce a hypercyclic operator, by scaling the operator T, and determine Lambda(T) in various cases. New properties of hyperciclic operators are discovered in this process. For instance, it is proved that any connected component of the essential spectrum of a hypercyclic operator must meet the unit circle.},
	keywords = {SHIFTS; CONTRACTIONS; Hypercyclic operators},
	year = {2020},
	eissn = {2198-2759}
}

@article{MTMT:22281640,
	title = {Confluent operator algebras and closability property},
	url = {https://m2.mtmt.hu/api/publication/22281640},
	author = {H, Bercovici and R G, Douglas and C, Foias and C, Pearcy},
	doi = {10.1016/j.jfa.2010.03.009},
	journal-iso = {J FUNCT ANAL},
	journal = {JOURNAL OF FUNCTIONAL ANALYSIS},
	volume = {258},
	unique-id = {22281640},
	issn = {0022-1236},
	year = {2010},
	eissn = {1096-0783},
	pages = {4122-4153}
}

@article{MTMT:22281643,
	title = {On contractions with compact defects},
	url = {https://m2.mtmt.hu/api/publication/22281643},
	author = {M F, Gamal},
	doi = {10.1007/s10958-010-9811-6},
	journal-iso = {J MATH SCI (NEW YORK)},
	journal = {JOURNAL OF MATHEMATICAL SCIENCES (NEW YORK)},
	volume = {366},
	unique-id = {22281643},
	issn = {1072-3374},
	year = {2009},
	eissn = {1573-8795},
	pages = {13-41}
}

@article{MTMT:20790776,
	title = {On contractions that are quasiaffine transforms of unilateral shifts},
	url = {https://m2.mtmt.hu/api/publication/20790776},
	author = {Gamal, M F},
	journal-iso = {ACTA SCI MATH (SZEGED)},
	journal = {ACTA SCIENTIARUM MATHEMATICARUM (SZEGED)},
	volume = {74},
	unique-id = {20790776},
	issn = {0001-6969},
	year = {2008},
	pages = {757-767}
}

@article{MTMT:1265041,
	title = {Shift-type invariant subspaces of contractions},
	url = {https://m2.mtmt.hu/api/publication/1265041},
	author = {Kérchy, László},
	doi = {10.1016/j.jfa.2007.01.011},
	journal-iso = {J FUNCT ANAL},
	journal = {JOURNAL OF FUNCTIONAL ANALYSIS},
	volume = {246},
	unique-id = {1265041},
	issn = {0022-1236},
	year = {2007},
	eissn = {1096-0783},
	pages = {281-301}
}

@article{MTMT:20134327,
	title = {Hereditarily normaloid contractions},
	url = {https://m2.mtmt.hu/api/publication/20134327},
	author = {Duggal, B P and Djordjevic and Kubrusly, C S},
	journal-iso = {ACTA SCI MATH (SZEGED)},
	journal = {ACTA SCIENTIARUM MATHEMATICARUM (SZEGED)},
	volume = {71},
	unique-id = {20134327},
	issn = {0001-6969},
	year = {2005},
	pages = {337-352}
}

@inproceedings{MTMT:26883215,
	title = {On the hyperinvariant subspace problem for asymptotically nonvanishing contractions},
	url = {https://m2.mtmt.hu/api/publication/26883215},
	author = {Kerchy, L},
	booktitle = {OPERATOR THEORY : ADVANCES AND APPLICATIONS},
	publisher = {Birkhäuser Publishing Ltd.},
	unique-id = {26883215},
	year = {2001},
	pages = {399-422}
}

@article{MTMT:20134420,
	title = {Remarks, examples and spectral properties of generalized Toeplitz operators},
	url = {https://m2.mtmt.hu/api/publication/20134420},
	author = {Mancera, C H and Paul, P J},
	journal-iso = {ACTA SCI MATH (SZEGED)},
	journal = {ACTA SCIENTIARUM MATHEMATICARUM (SZEGED)},
	volume = {66},
	unique-id = {20134420},
	issn = {0001-6969},
	year = {2000},
	pages = {737-753}
}

@article{MTMT:20134413,
	title = {Some multiplicities for contractions with Hilbert-Schmidt defect},
	url = {https://m2.mtmt.hu/api/publication/20134413},
	author = {Exner, G R and Jung, I B},
	journal-iso = {OPER THER ADV APPL},
	journal = {OPERATOR THEORY: ADVANCES AND APPLICATIONS},
	volume = {104},
	unique-id = {20134413},
	issn = {0255-0156},
	year = {1998},
	eissn = {2296-4878},
	pages = {113-138}
}

@article{MTMT:20134434,
	title = {Hyperreflexivity of contractions close to isometries},
	url = {https://m2.mtmt.hu/api/publication/20134434},
	author = {Kapustin, V V},
	volume = {174},
	unique-id = {20134434},
	year = {1996},
	pages = {193-203}
}

@article{MTMT:1049043,
	title = {On the functional calculus of contractions with nonvanishing unitary symptotes},
	url = {https://m2.mtmt.hu/api/publication/1049043},
	author = {Kérchy, László},
	journal-iso = {MICH MATH J},
	journal = {MICHIGAN MATHEMATICAL JOURNAL},
	volume = {37},
	unique-id = {1049043},
	issn = {0026-2285},
	year = {1990},
	eissn = {1945-2365},
	pages = {323-338}
}

@article{MTMT:1048794,
	title = {Isometric asymptotes of power bounded operators},
	url = {https://m2.mtmt.hu/api/publication/1048794},
	author = {Kérchy, László},
	doi = {10.1512/iumj.1989.38.38008},
	journal-iso = {INDIANA U MATH J},
	journal = {INDIANA UNIVERSITY MATHEMATICS JOURNAL},
	volume = {38},
	unique-id = {1048794},
	issn = {0022-2518},
	year = {1989},
	eissn = {1943-5258},
	pages = {173-188}
}

@book{MTMT:20134408,
	title = {Introduction to Operator Theory and Invariant Subspaces},
	url = {https://m2.mtmt.hu/api/publication/20134408},
	author = {Beauzamy, B},
	publisher = {North-Holland},
	unique-id = {20134408},
	year = {1988}
}

@article{MTMT:20134456,
	title = {On defect functions of contractions},
	url = {https://m2.mtmt.hu/api/publication/20134456},
	author = {Durszt, E},
	journal-iso = {OPER THER ADV APPL},
	journal = {OPERATOR THEORY: ADVANCES AND APPLICATIONS},
	volume = {28},
	unique-id = {20134456},
	issn = {0255-0156},
	year = {1988},
	eissn = {2296-4878},
	pages = {61-69}
}

@article{MTMT:1048377,
	title = {On the residual parts of completely non-unitary contractions},
	url = {https://m2.mtmt.hu/api/publication/1048377},
	author = {Kérchy, László},
	doi = {10.1007/BF01903372},
	journal-iso = {ACTA MATH HUNG},
	journal = {ACTA MATHEMATICA HUNGARICA},
	volume = {50},
	unique-id = {1048377},
	issn = {0236-5294},
	year = {1987},
	eissn = {1588-2632},
	pages = {127-145}
}