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Note on commuting quasi-nilpotent unbounded operators
Are explored the spectral properties for an unbounded operator U for which there exists an injective quasi-nilpotent unbounded operator N such that
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Modal Definability: Two Commuting Equivalence Relations
We prove that modal definability with respect to the class of all structures with two commuting equivalence relations is an undecidable problem. The...
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On a Natural Map Between Twistor Spaces
A diffeomorphism between the twistor spaces of two Riemannian metrics on a smooth manifold preserving the fibers is defined based on a well-known...
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Commuting quasi-interpolation
The quasi-interpolation operators introduced in Chapter 22 are \(L^1\)...
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Common fixed points for commuting multivalued non-convex map**s in metric trees
Recent work by Lau and Yao (J Math Anal Appl 459:203–216, 2018) and Mohamadi (J Fixed Point Theory Appl 21:83, 2019) initiated the study of common...
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Commuting Toeplitz Operators and Moment Maps on Cartan Domains of Type III
Let \(D^{III}_n\) and...
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On sets of maximally commuting and anticommuting Pauli operators
In this work, we study the structure and cardinality of maximal sets of commuting and anticommuting Paulis in the setting of the abelian Pauli group....
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The Enhanced Period Map and Equivariant Deformation Quantizations of Nilpotent Orbits
In a previous paper, the author and his collaborator studied the problem of lifting Hamiltonian group actions on symplectic varieties and Lagrangian...
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Generalized Derivations Commuting on Lie Ideals in Prime Rings
Let R be a prime ring of characteristic different from 2, U its Utumi quotient ring, C its extended centroid, L a non-central Lie ideal of R and F , G ...
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The Borel map in the mixed Beurling setting
The Borel map takes a smooth function to its infinite jet of derivatives (at zero). We study the restriction of this map to ultradifferentiable...
