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학술논문대한수학회논문집2023.10 발행

Some classes of operators related to $(\lowercase{m},\lowercase{n})$-paranormal and $(\lowercase{m},\lowercase{n})^*$-paranormal operators

Some classes of operators related to $(\lowercase{m},\lowercase{n})$-paranormal and $(\lowercase{m},\lowercase{n})^*$-paranormal operators

Shine Lal Enose(University College, Thiruvananthapuram); Ramya Perumal(N.S.S College, Nemmara); Prasad Thankarajan(University of Calicut, Malapuram)

38권 4호, 1075~1090쪽

초록

In this paper, we study new classes of operators $k$-quasi $(\lowercase{m},\lowercase{n})$-paranormal operator, $k$-quasi $(\lowercase{m},\lowercase{n})^*$-paranormal operator, $k$-qu\-asi $(\lowercase{m},\lowercase{n})$-class~ $\mathcal{Q}$ operator and $k$-quasi $(\lowercase{m},\lowercase{n})$-class~ $\mathcal{Q^{*}}$ operator which are the generalization of $(\lowercase{m},\lowercase{n})$-paranormal and $(\lowercase{m},\lowercase{n})^*$-paranormal operators. We give matrix characterizations for $k$-quasi $(\lowercase{m},\lowercase{n})$-paranormal and $k$-quasi $(\lowercase{m},\lowercase{n})^*$-paranormal operators. Also we study some properties of $k$-quasi $(\lowercase{m},\lowercase{n})$-class~ $\mathcal{Q}$ operator and $k$-quasi $(\lowercase{m},\lowercase{n})$-class~ $\mathcal{Q}^*$ operators. Moreover, these classes of composition operators on $L^2$ spaces are characterized.

Abstract

In this paper, we study new classes of operators $k$-quasi $(\lowercase{m},\lowercase{n})$-paranormal operator, $k$-quasi $(\lowercase{m},\lowercase{n})^*$-paranormal operator, $k$-qu\-asi $(\lowercase{m},\lowercase{n})$-class~ $\mathcal{Q}$ operator and $k$-quasi $(\lowercase{m},\lowercase{n})$-class~ $\mathcal{Q^{*}}$ operator which are the generalization of $(\lowercase{m},\lowercase{n})$-paranormal and $(\lowercase{m},\lowercase{n})^*$-paranormal operators. We give matrix characterizations for $k$-quasi $(\lowercase{m},\lowercase{n})$-paranormal and $k$-quasi $(\lowercase{m},\lowercase{n})^*$-paranormal operators. Also we study some properties of $k$-quasi $(\lowercase{m},\lowercase{n})$-class~ $\mathcal{Q}$ operator and $k$-quasi $(\lowercase{m},\lowercase{n})$-class~ $\mathcal{Q}^*$ operators. Moreover, these classes of composition operators on $L^2$ spaces are characterized.

발행기관:
대한수학회
DOI:
http://dx.doi.org/10.4134/CKMS.c220355
분류:
수학

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Some classes of operators related to $(\lowercase{m},\lowercase{n})$-paranormal and $(\lowercase{m},\lowercase{n})^*$-paranormal operators | 대한수학회논문집 2023 | AskLaw | 애스크로 AI