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1

Differential operators on homogeneous spaces

SigurĐur Helgason

Journal:

Acta Mathematica

Year:

1959

Language:

english

File:

PDF, 2.77 MB

english, 1959

2

Some Results on Invariant Differential Operators on Symmetric Spaces

Sigurdur Helgason

Journal:

American Journal of Mathematics

Year:

1992

Language:

english

File:

PDF, 1.04 MB

english, 1992

3

Huygens' principle for wave equations on symmetric spaces

Sigurdur Helgason

Journal:

Journal of Functional Analysis

Year:

1992

Language:

english

File:

PDF, 397 KB

english, 1992

4

The Surjectivity of Invariant Differential Operators on Symmetric Spaces I

Sigurdur Helgason

Journal:

Annals of Mathematics

Year:

1973

Language:

english

File:

PDF, 1.69 MB

english, 1973

5

The bounded spherical functions on symmetric spaces

Sigurdur Helgason, Kenneth Johnson

Journal:

Advances in Mathematics

Year:

1969

Language:

english

File:

PDF, 289 KB

english, 1969

6

A Centennial: Wilhelm Killing and the Exceptional Groups

Sigurdur Helgason

Journal:

The Mathematical Intelligencer

Year:

1990

Language:

english

File:

PDF, 1.79 MB

english, 1990

7

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

Sigurdur Helgason

Journal:

Mathematische Annalen

Year:

1966

Language:

english

File:

PDF, 621 KB

english, 1966

8

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || Structure of manifolds of nonpositive curvature

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 3.54 MB

english, 1985

9

Eigenspaces of the Laplacian; integral representations and irreducibility

Sigurdur Helgason

Journal:

Journal of Functional Analysis

Year:

1974

Language:

english

File:

PDF, 1.02 MB

english, 1974

10

A duality for symmetric spaces with applications to group representations

Sigurdur Helgason

Journal:

Advances in Mathematics

Year:

1970

Language:

english

File:

PDF, 6.33 MB

english, 1970

11

The flat horocycle transform for a symmetric space

Sigurdur Helgason

Journal:

Advances in Mathematics

Year:

1992

Language:

english

File:

PDF, 777 KB

english, 1992

12

Remarks on B. Rubin, “Radon, cosine and sine transforms on real hyperbolic space”

Sigurdur Helgason

Journal:

Advances in Mathematics

Year:

2005

Language:

english

File:

PDF, 122 KB

english, 2005

13

A duality for symmetric spaces with applications to group representations. III. Tangent space analysis

Sigurdur Helgason

Journal:

Advances in Mathematics

Year:

1980

Language:

english

File:

PDF, 1.24 MB

english, 1980

14

The Abel, Fourier and radon transforms on symmetric spaces

Sigurdur Helgason

Journal:

Indagationes Mathematicae

Year:

2005

Language:

english

File:

PDF, 825 KB

english, 2005

15

On Riemannian Curvature of Homogeneous Spaces

Sigurdur Helgason

Journal:

Proceedings of the American Mathematical Society

Year:

1958

Language:

english

File:

PDF, 213 KB

english, 1958

16

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

Sigurdur Helgason

Journal:

Acta Mathematica

Year:

1965

Language:

english

File:

PDF, 1.17 MB

english, 1965

17

Immune parameters of immunised cod (Gadus morhua L.)

Bergljót Magnadóttir, Halla Jónsdóttir, Sigurđur Helgason, Björn Björnsson, Stein Tore Solem, Lars Pilström

Journal:

Fish & Shellfish Immunology

Year:

2001

Language:

english

File:

PDF, 171 KB

english, 2001

18

[Lecture Notes in Mathematics] Integral Geometry, Radon Transforms and Complex Analysis Volume 1684 || Analytic discs and the extendibility of CR functions

Berenstein, Carlos A., Ebenfelt, Peter F., Gindikin, Simon G., Helgason, Sigurdur, Tumanov, Alexander E., Casadio Tarabusi, Enrico, Picardello, Massimo A., Zampieri, Giuseppe

Year:

1998

Language:

english

File:

PDF, 1.17 MB

english, 1998

19

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

Sigurdur Helgason

Journal:

Advances in Mathematics

Year:

1976

Language:

english

File:

PDF, 1.46 MB

english, 1976

20

Support of Radon transforms

Sigurdur Helgason

Journal:

Advances in Mathematics

Year:

1980

Language:

english

File:

PDF, 440 KB

english, 1980

21

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || Symmetric immersions in pseudo-Riemannian space forms

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 623 KB

english, 1985

22

Applications of the Radon Transform to Representations of Semisimple Lie Groups

Sigurdur Helgason

Journal:

Proceedings of the National Academy of Sciences

Year:

1969

Language:

english

File:

PDF, 573 KB

english, 1969

23

Invariants and fundamental functions

Sigurdur Helgason

Journal:

Acta Mathematica

Year:

1963

Language:

english

File:

PDF, 833 KB

english, 1963

24

Totally geodesic spheres in compact symmetric spaces

Sigurdur Helgason

Journal:

Mathematische Annalen

Year:

1966

Language:

english

File:

PDF, 535 KB

english, 1966

25

Integral geometry and multitemporal wave equations

Sigurdur Helgason

Journal:

Communications on Pure and Applied Mathematics

Year:

1998

Language:

english

File:

PDF, 444 KB

english, 1998

26

Drug Effects on Pre-and Post-branchial Blood Pressure and Heart Rate in a Free-swimming Marine Teleost, Gadus morhua

Sigurdur St. Helgason, Stefan Nilsson

Journal:

Acta Physiologica

Year:

1973

Language:

english

File:

PDF, 600 KB

english, 1973

27

Lie Groups and their Representations. Summer School of the Bolyai János Mathematical Societyby I. M. Gelfand

Review by: Sigurdur Helgason

Journal:

American Scientist

Year:

1976

Language:

english

File:

PDF, 337 KB

english, 1976

28

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || Conformal orbits of electromagnetic Riemannian curvature tensors electromagnetic implies gravitational radiation

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

File:

PDF, 1.69 MB

1985

29

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || Applications of the Gauss mapping for hypersurfaces of the sphere

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 489 KB

english, 1985

30

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || Examples concerning the spectrum of a closed Riemannian manifold

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 199 KB

english, 1985

31

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || Submanifolds and the second fundamental tensor

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 384 KB

english, 1985

32

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || Tight smoothing of some polyhedral surfaces

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 550 KB

english, 1985

33

On anomalously magnetic basalt lavas from Stardalur Iceland

Örn Helgason, Sigurđur Steinthórsson, Morten B. Madsen, Steen Mørup

Journal:

Hyperfine Interactions

Year:

1990

Language:

english

File:

PDF, 303 KB

english, 1990

34

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || Embedded minimal surfaces, computer graphics and elliptic functions

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 499 KB

english, 1985

35

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || Small eigenvalues of the Laplacian and examples

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 277 KB

english, 1985

36

Integral Geometry and Radon Transforms || The Radon Transform on R n

Helgason, Sigurdur

Year:

2011

Language:

english

File:

PDF, 748 KB

english, 2011

37

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || The Bernstein problem for foliations

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 128 KB

english, 1985

38

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || On the number of tritangencies of a surface in IR3

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 583 KB

english, 1985

39

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || Positively curved minimal submanifolds

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 587 KB

english, 1985

40

Congenital cardiac malformations in Iceland from 1990 through 1999

Stephensen, Sigurdur Sverrir, Sigfusson, Gunnlaugur, Eiriksson, Herbert, Sverrisson, Jon Thor, Torfason, Bjarni, Haraldsson, Asgeir, Helgason, Hrodmar

Journal:

Cardiology in the Young

Year:

2004

Language:

english

File:

PDF, 78 KB

english, 2004

41

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || A survey on CR — Submanifolds of Kaehlerian manifolds

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 514 KB

english, 1985

42

Integral Geometry and Radon Transforms || || Front_matter

Helgason, Sigurdur

Year:

2011

Language:

english

File:

PDF, 532 KB

english, 2011

43

[Progress in Mathematics] The Radon Transform Volume 5 ||

Helgason, Sigurdur

Year:

1999

Language:

english

File:

PDF, 18.55 MB

english, 1999

44

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || A Toponogov splitting theorem for Lorentzian manifolds

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 726 KB

english, 1985

45

Integral Geometry and Radon Transforms ||

Helgason, Sigurdur

Year:

2011

Language:

english

File:

PDF, 532 KB

english, 2011

46

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || Horizontal lifts of isometric immersions into the bundle space of a pseudo-Riemannian submersion

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 769 KB

english, 1985

47

[Lecture Notes in Mathematics] Global Differential Geometry and Global Analysis 1984 Volume 1156 || Examples of 1-codimensional non totally geodesic isometric immersions of pseudo-riemannian space forms with the same positive constant curvature and the same space-like rank

Ferus, Dirk, Gardner, Robert B., Helgason, Sigurdur, Simon, Udo

Year:

1985

Language:

english

File:

PDF, 625 KB

english, 1985

48

Group Representations and Special Functions. Mathematics and Its Applications (East European Series)by Antoni Wawrzynczyk

Review by: Sigurdur Helgason

Journal:

American Scientist

Year:

1985

Language:

english

File:

PDF, 339 KB

english, 1985

49

The clinical course of herpes zoster: A prospective study in primary care

Helgason, Sigurdur, Sigurdsson, Johann A, Gudmundsson, Sigurdur

Journal:

European Journal of General Practice

Year:

1996

Language:

english

File:

PDF, 1.60 MB

english, 1996

50

Integral Geometry and Geometric Probability. Encyclopedia of Mathematics and Its Applications, Vol. 1, Section: Probabilityby Luis A. Santaló

Review by: Sigurdur Helgason

Journal:

American Scientist

Year:

1978

Language:

english

File:

PDF, 572 KB

english, 1978

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