https://hdl.handle.net/1721.1/18164 2026-04-12T15:29:55Z 2026-04-12T15:29:55Z Helgason, Sigurdur https://hdl.handle.net/1721.1/26691 2025-02-11T19:53:19Z 1957-01-01T00:00:00Z

Topologies of group algebras and a theorem of Littlewood Helgason, Sigurdur An important problem in Fourier analysis is that of investigating the relationship between the "size" of a function and the "size" of its Fourier transform. The present paper can be regarded as a contribution to this problem. First published in the Transactions of the American Mathematical Society in Vol.86, 1957, published by the American Mathematical Society

1957-01-01T00:00:00Z Helgason, Sigurdur https://hdl.handle.net/1721.1/26690 2025-02-11T19:53:19Z 1988-01-01T00:00:00Z

Response to Steele Prize Award Helgason, Sigurdur First published in the Notices of the American Mathematical Society in Vol.35, 1988, published by the American Mathematical Society

1988-01-01T00:00:00Z Helgason, Sigurdur https://hdl.handle.net/1721.1/26689 2025-02-11T19:53:19Z 1977-01-01T00:00:00Z

Invariant differential equations on homogeneous manifolds Helgason, Sigurdur First published in the Bulletin of the American Mathematical Society in Vol.83, 1977, published by the American Mathematical Society

1977-01-01T00:00:00Z Helgason, Sigurdur https://hdl.handle.net/1721.1/26688 2025-02-11T19:53:19Z 1973-01-01T00:00:00Z

Paley-Wiener theorems and surjectivity of invariant differential operators on symmetric spaces and Lie groups Helgason, Sigurdur First published in the Bulletin of the American Mathematical Society in Vol.79, 1973, published by the American Mathematical Society

1973-01-01T00:00:00Z Helgason, Sigurdur https://hdl.handle.net/1721.1/26687 2025-02-11T19:53:19Z 1968-01-01T00:00:00Z

A Fatou- type theorem for harmonic functions on symmetric spaces Helgason, Sigurdur First published in the Bulletin of the American Mathematical Society in Vol.74, 1968, published by the American Mathematical Society

1968-01-01T00:00:00Z Helgason, Sigurdur https://hdl.handle.net/1721.1/26686 2025-02-11T19:53:19Z 1965-01-01T00:00:00Z

Radon-Fourier transforms on symmetric spaces and related group representations Helgason, Sigurdur First published in the Bulletin of the American Mathematical Society in Vol.71, 1965, published by the American Mathematical Society

1965-01-01T00:00:00Z Helgason, Sigurdur https://hdl.handle.net/1721.1/26685 2025-02-11T19:53:19Z 1964-01-01T00:00:00Z

A duality in integral geometry; some generalizations of the Radon transform Helgason, Sigurdur First published in the Bulletin of the American Mathematical Society in Vol.70, 1964, published by the American Mathematical Society

1964-01-01T00:00:00Z Helgason, Sigurdur https://hdl.handle.net/1721.1/26684 2025-02-11T19:53:19Z 1963-07-01T00:00:00Z

Duality and Radon transform for symmetric spaces Helgason, Sigurdur First published in the Bulletin of the American Mathematical Society in Vol.69, 1963, published by the American Mathematical Society

1963-07-01T00:00:00Z Helgason, Sigurdur https://hdl.handle.net/1721.1/26683 2025-02-11T19:53:19Z 1963-01-01T00:00:00Z

Fundamental solutions of invariant differential operators on symmetric spaces Helgason, Sigurdur First published in the Bulletin of the American Mathematical Society in 1963, published by the American Mathematical Society

1963-01-01T00:00:00Z Helgason, Sigurdur https://hdl.handle.net/1721.1/26682 2025-02-11T19:53:19Z 1962-01-01T00:00:00Z

Some results on invariant theory Helgason, Sigurdur First published in the Bulletin of the American Mathematical Society in Vol.68 1962, published by the American Mathematical Society

1962-01-01T00:00:00Z