arXiv subjects

Domagoj Kovacevic

Publications and source records attributed to Domagoj Kovacevic.

4 recordsLinked to original sources

arXiv2020

Corners and fundamental corners for the groups Spin(n,1)

We study corners and fundamental corners of the irreducible representations of the groups G=Spin(n,1) that are not elementary, i.e. that are equivalent to subquotients of reducible nonunitary principal series representations. For even n we obtain results in a way analogous to the results in [10] for the groups SU(n,1). Especially, we again get a bijection between the nonelementary part $\hat{G}^0$ of the unitary dual $\hat{G}$ and the unitary dual $\hat{K}.$ In the case of odd n we get a bijection between $\hat{G}^0$ and a tru subset of $\hat{K}.$

math.RT↗

arXiv2020

Unitary (g,K) modules of SU(2,1)

Let G=SU(2,1). In this paper we parametrize irreducible unitary (g,K) modules of G. The parametrization is done in two steps. Firstly, we parametrize irreducible (g,K) modules (Theorem 3). In the second step we find unitary (g,K) modules (Theorem 5). One can compare our results with results of Kraljevic.

math.RT↗

arXiv2018

On unitary representations of disconnected real reductive groups

Let $G$ be the real reductive group and let $G_0$ be the identity component. Let us assume that the unitary dual $\hat{G_0}$ is known. In this paper (in Section 5) the unitary dual $\hat{G}$ is constructed. Automorphisms of $G_0$ generated by elements of $G$ are the main ingredient of the construction. If the automorphism is outer, one has to consider the corresponding intertwining operators $S$. Operators $S$ and their properties are analyzed in Section 4. Automorphisms of $g_0$ are closely related to automorphisms of $G_0$. They are investigated in Section 3. Automorphisms of so(4,4)$ are analyzed in Subsection 3.1.

math.RT↗

arXiv2012

A General formulation of the Moyal and Voros products and its physical interpretation

A unifying perspective on the Moyal and Voros products and their physical meanings has been recently presented in the literature, where the Voros formulation admits a consistent physical interpretation. We define a star product $\star$, in terms of an antisymmetric fixed matrix $Θ$, and an arbitrary symmetric matrix $Φ$, that is a generalization of the Moyal and the Voros products. We discuss the quantum mechanics and the physical meaning of the generalized star product.

math-ph↗