Analyticity for certain solutions of non-hypoelliptic differential operators on the Heisenberg group
Linda P. Rothschild, David S. Tartakoff (1981)
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Linda P. Rothschild, David S. Tartakoff (1981)
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Michael Neumann, Vlastimil Pták (1985)
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Zofia Szmydt, Bogdan Ziemian (1983)
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2010 Mathematics Subject Classification: Primary 35L05. Secondary 46E35, 35J25, 22E30. In this paper we define the homogeneous Besov spaces associated with the Dunkl operators on R^d, and we give a complete analysis on these spaces and same applications.
Galakhov, E. (1997)
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Ryotaro Sato (1976)
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Ryotaro Sato (1976)
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Abdelkader Benali, Mohammed Hichem Mortad (2014)
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We are mainly concerned with the result of Kaplansky on the composition of two normal operators in the case in which at least one of the operators is unbounded.
Eungil Ko (2003)
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We study some properties of w-hyponormal operators. In particular we show that some w-hyponormal operators are subscalar. Also we state some theorems on invariant subspaces of w-hyponormal operators.
S.C. Arora, Ramesh Kumar (1981)
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John B. Conway, Gabriel Prǎjiturǎ (2005)
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For a scalar λ, two operators T and S are said to λ-commute if TS = λST. In this note we explore the pervasiveness of the operators that λ-commute with a compact operator by characterizing the closure and the interior of the set of operators with this property.
Humphrey Fong (1970)
Colloquium Mathematicae
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A. Menikoff (1976-1977)
Séminaire Équations aux dérivées partielles (Polytechnique)
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