Zobrazeno 1 - 10
of 133
pro vyhledávání: '"Mantoiu, M."'
Autor:
Mantoiu, M.
Classically, Gohberg-type Lemmas provide lower bounds for the distance of suitable pseudodifferential operators acting in a Hilbert space to the ideal of compact operators, in terms of "the behavior of the symbol at infinity". In this article the pse
Externí odkaz:
http://arxiv.org/abs/2210.02568
Autor:
Flores, F., Mantoiu, M.
Topological groupoids admit various types of morphisms. We push these notions to the level of continuous groupoid actions to obtain various types of groupoid action morphisms. Some dynamical properties and their relation to these morphisms are studie
Externí odkaz:
http://arxiv.org/abs/2105.00566
Autor:
Mantoiu, M., Sandoval, M.
Publikováno v:
Analysis and Partial Differential Equations: Perspectives from Developing Countries, Springer, 172-190, 2016
In a recent paper by M. Mantoiu and M. Ruzhansky, a global pseudo-differential calculus has been developed for unimodular groups of type I. In the present article we generalize the main results to arbitrary locally compact groups of type I. Our metho
Externí odkaz:
http://arxiv.org/abs/2008.08065
Autor:
Mantoiu, M.
We define and study coherent states, a Berezin-Toeplitz quantization and covariant symbols on the product between a connected simply connected nilpotent Lie group and the dual of its Lie algebra. The starting point is a Weyl system codifying the natu
Externí odkaz:
http://arxiv.org/abs/1905.02837
Autor:
Mantoiu, M.
We reconsider the quantization of symbols defined on the product between a nilpotent Lie algebra and its dual. To keep track of the non-commutative group background, the Lie algebra is endowed with the Baker-Campbell-Hausdorff product, making it via
Externí odkaz:
http://arxiv.org/abs/1905.02833
Autor:
Mantoiu, M.
We treat spectral problems by twisted groupoid methods. To Hausdorff locally compact groupoids endowed with a continuous $2$-cocycle one associates the reduced twisted groupoid $C^*$-algebra. Elements (or multipliers) of this algebra admit natural Hi
Externí odkaz:
http://arxiv.org/abs/1809.03347
Autor:
Mantoiu, M.
Normal elements (or multipliers) of the C* algebra of a certain class of locally compact groupoids admit a natural faithful representation as normal operators on the $L^2$-space of a dense orbit of the groupoid. We prove norm estimates on the product
Externí odkaz:
http://arxiv.org/abs/1809.00081
Autor:
Mantoiu, M., Sandoval, M.
Publikováno v:
Monatshefte f\"ur Mathematik 190 (2019) 559-58
In recent papers and books, a global quantization has been developed for unimodular groups of type I. It involves operator-valued symbols defined on the product between the group $\mathsf{G}$ and its unitary dual $\widehat{\mathsf{G}}$, composed of e
Externí odkaz:
http://arxiv.org/abs/1801.06838
Autor:
Mantoiu, M., Ruzhansky, M.
For a connected simply connected nilpotent Lie group $\G$ with Lie algebra $\g$ and unitary dual $\wG$ one has (a) a global quantization of operator-valued symbols defined on $\G\times\wG$, involving the representation theory of the group, (b) a quan
Externí odkaz:
http://arxiv.org/abs/1611.07581