Some properties of paranormal and hyponormal operators.
Braha, N.L., Lohaj, M, Marevci, F.H., Lohaj, Sh. (2009)
Bulletin of Mathematical Analysis and Applications [electronic only]
Similarity:
Braha, N.L., Lohaj, M, Marevci, F.H., Lohaj, Sh. (2009)
Bulletin of Mathematical Analysis and Applications [electronic only]
Similarity:
Rashid, M.H.M., Noorani, M.S.M., Saari, A.S. (2008)
Bulletin of the Malaysian Mathematical Sciences Society. Second Series
Similarity:
Bucur, Amelia (2001)
General Mathematics
Similarity:
George A. Anastassiou, Heinz H. Gonska (1995)
Annales Polonici Mathematici
Similarity:
In recent papers the authors studied global smoothness preservation by certain univariate and multivariate linear operators over compact domains. Here the domain is ℝ. A very general positive linear integral type operator is introduced through a convolution-like iteration of another general positive linear operator with a scaling type function. For it sufficient conditions are given for shift invariance, preservation of global smoothness, convergence to the unit with rates, shape preserving...
Mohamed Barraa, Mohamed Boumazgour (2001)
Extracta Mathematicae
Similarity:
Stević, Stevo (2009)
Sibirskij Matematicheskij Zhurnal
Similarity:
Cheng, Junxiang, Yuan, Jiangtao (2011)
Annals of Functional Analysis (AFA) [electronic only]
Similarity:
Takasaki, Kanehisa (2009)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
Similarity:
Zhou, Xiaosha, Liu, Lanzhe (2009)
Acta Universitatis Apulensis. Mathematics - Informatics
Similarity:
Bachir, A., Segres, A. (2009)
International Journal of Open Problems in Computer Science and Mathematics. IJOPCM
Similarity:
S. Pilipović, N. Teofanov (2002)
Bulletin, Classe des Sciences Mathématiques et Naturelles, Sciences mathématiques
Similarity:
Mecheri, Salah (2009)
International Journal of Open Problems in Computer Science and Mathematics. IJOPCM
Similarity:
Yu. Farforovskaya (1994)
Banach Center Publications
Similarity:
This paper shows some directions of perturbation theory for Lipschitz functions of selfadjoint and normal operators, without giving precise proofs. Some of the ideas discussed are explained informally or for the finite-dimensional case. Several unsolved problems are mentioned.