2026 Sigurdur Helgason: Mathematics Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	National Ranking	Publications	Citations
Mathematics	33	2968	1193	134	24132

Discipline name

D-Index

World Ranking

National Ranking

Publications

Citations

Mathematics

2968

1193

134

24132

Research.com Recognitions

2013 - Fellow of the American Mathematical Society
1970 - Fellow of the American Academy of Arts and Sciences
1964 - Fellow of John Simon Guggenheim Memorial Foundation

Overview

Sigurdur Helgason was affiliated with MIT in the United States. Their research focused primarily on fields such as Medicine, Neuroscience, and Psychology, with additional work in subfields including Physiology, Cognitive Neuroscience, and Experimental and Cognitive Psychology.

The scientist's research encompassed topics related to obstructive sleep apnea, sleep and wakefulness, and sleep-related disorders.

Obstructive Sleep Apnea Research
Sleep and Wakefulness Research
Sleep and related disorders

Among the published work, Sigurdur Helgason contributed to a paper titled "Evaluating the feasibility of out-of-center sleep testing (OCST), level II polysomnography (PSG) - The experience of a Canadian service provider," published in 2024 in the journal Sleep Medicine.

Evaluating the feasibility of out-of-center sleep testing (OCST), level II polysomnography (PSG) - The experience of a Canadian service provider (2024, Sleep Medicine)

Frequent co-authors who collaborated with Sigurdur Helgason included:

J. Leech
Christian Guilbault
Tetyana Kendzerska
Nancy Morin
Carlos Teixeira

Their work was published notably in the journal Sleep Medicine, reflecting a concentration within sleep-related research domains.

Sleep Medicine

Throughout their career, Sigurdur Helgason received several fellowships, including:

Fellow of the American Mathematical Society (2013)
Fellow of the American Academy of Arts and Sciences (1970)
Fellow of the John Simon Guggenheim Memorial Foundation (1964)

Best Publications

Differential Geometry, Lie Groups, and Symmetric Spaces

Sigurdur Helgason

9382
Citations
Differential Geometry and Symmetric Spaces

Sigurdur Helgason

4359
Citations
Groups and geometric analysis

Sigurdur Helgason

3497
Citations
The Radon Transform

Sigurdur Helgason

1744
Citations
Geometric Analysis on Symmetric Spaces

Sigurdur Helgason

911
Citations
LIE GROUPS AND SYMMETRIC SPACES.

S. Helgason

837
Citations
A duality for symmetric spaces with applications to group representations

Sigurdur Helgason

445
Citations
The Radon transform on Euclidean spaces, compact two-point homogeneous spaces and Grassmann manifolds

Sigurdur Helgason

390
Citations
Integral Geometry and Radon Transforms

Sigurdur Helgason

383
Citations
Differential operators on homogeneous spaces

Unknown

296
Citations
Topics in Harmonic Analysis on Homogeneous Spaces

Sigurdur Helgason

183
Citations
The Surjectivity of Invariant Differential Operators on Symmetric Spaces I

Sigurdur Helgason

143
Citations
Eigenspaces of the Laplacian; integral representations and irreducibility

Sigurdur Helgason

135
Citations
Multipliers of Banach Algebras

S. Helgason

133
Citations
An analogue of the Paley-Wiener theorem for the Fourier transform on certain symmetric spaces

Sigurdur Helgason

123
Citations
Fundamental Solutions of Invariant Differential Operators on Symmetric Spaces

S. Helgason

115
Citations
A duality for symmetric spaces with applications to group representations, II. Differential equations and eigenspace representations

Sigurdur Helgason

100
Citations
The bounded spherical functions on symmetric spaces

Sigurdur Helgason;Kenneth Johnson

85
Citations
Radon-Fourier transforms on symmetric spaces and related group representations

S. Helgason

73
Citations
Analysis on Lie Groups and Homogeneous Spaces

Sigurdur Helgason

71
Citations
A duality in integral geometry; some generalizations of the Radon transform

Sigurdur Helgason

69
Citations
Differential Geometry and Symmetric Spaces.

Carl B. Allendoerfer;Sigurdur Helgason

66
Citations
A duality for symmetric spaces

Sigurdur Helgason

49
Citations

Frequent Co-Authors

Bertram Kostant MIT

David Mumford Brown University

Raoul Bott Harvard University

Michael Atiyah University of Edinburgh

Dana Scott University of California, Berkeley

Carlos A. Berenstein University of Maryland, College Park

External Links

Personal website of Sigurdur Helgason

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