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Publications Influence

Groupoids associated to semigroup actions

- J. Renault, S. Sundar
- Mathematics
- 1 February 2014

In this paper, we consider topological semigroup actions on compact topological spaces. Under mild assumptions on the semigroup and the action, we construct a semi-direct product groupoid with a Haar… Expand

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Cuntz-Li relations, inverse semigroups and groupoids

- S. Sundar
- Mathematics
- 23 January 2012

In this paper we show that the universal C � -algebra satisfying the Cuntz-Li relations is generated by an inverse semigroup of partial isometries. We apply Exel's theory of tight representations to… Expand

7 1- PDF

Quantum double suspension and spectral triples

- Partha Sarathi Chakraborty, S. Sundar
- Mathematics
- 1 May 2011

Abstract In this paper we are concerned with the construction of a general principle that will allow us to produce regular spectral triples with finite and simple dimension spectrum. We introduce the… Expand

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Injectivity of the CCR functor

- S. Sundar
- Mathematics
- 13 June 2019

Let $P$ be a closed convex cone in $\mathbb{R}^{d}$ which we assume is spanning and pointed i.e. $P-P=\mathbb{R}^{d}$ and $P \cap -P=\{0\}$. For an isometric representation $V$ of $P$, let… Expand

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Differentiation of early mild cognitive impairment in brainstem MR images using multifractal detrended moving average singularity spectral features

- P. Rohini, S. Sundar, S. Ramakrishnan
- Mathematics, Computer Science
- Biomed. Signal Process. Control.
- 1 March 2020

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E-semigroups over closed convex cones.

- Anbu Arjunan, R. Srinivasan, S. Sundar
- Mathematics
- 30 July 2018

We initiate a study of E-semigroups over convex cones. We prove a structure theorem for E-semigroups which leave the algebra of compact operators invariant. Then we study in detail the CCR flows,… Expand

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On a construction due to Khoshkam and Skandalis

- S. Sundar
- Mathematics
- 4 October 2015

In this paper, we consider the Wiener Hopf algebra, denoted $\mathcal{W}(A,P,G,\alpha)$, associated to an action of a discrete subsemigroup $P$ of a group $G$ on a $C^{*}$-algebra $A$. We show that… Expand

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A Computation with the Connes–Thom Isomorphism

- S. Sundar
- Mathematics
- Canadian Mathematical Bulletin
- 2 March 2012

Abstract Let $A\,\in \,{{M}_{n}}\left( \mathbb{R} \right)$ be an invertible matrix. Consider the semi-direct product ${{\mathbb{R}}^{n}}\rtimes \,\mathbb{Z}$ where the action of $\mathbb{Z}$ on… Expand

Transverse magnetic field influence on wakefield in plasmas

- S. Sundar, Z. Moldabekov
- 2019

We present the results of an investigation of the wakefield around a stationary charged grain in an external magnetic field with non-zero transverse component with respect to the ion flow direction.… Expand

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C*-algebras associated to topological Ore semigroups

- S. Sundar
- Mathematics
- 19 August 2014

Let $G$ be a locally compact group and $P \subset G$ be a closed Ore semigroup containing the identity element. Let $V: P \to B(\clh)$ be a representation such that for every $a \in P$, $V_{a}$ is an… Expand

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