Sigurdur Helgason http://hdl.handle.net/1721.1/18164 Sun, 09 Jun 2013 14:10:52 GMT 2013-06-09T14:10:52Z Topologies of group algebras and a theorem of Littlewood http://hdl.handle.net/1721.1/26691 Topologies of group algebras and a theorem of Littlewood Helgason, S. 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 Tue, 01 Jan 1957 00:00:00 GMT http://hdl.handle.net/1721.1/26691 1957-01-01T00:00:00Z Response to Steele Prize Award http://hdl.handle.net/1721.1/26690 Response to Steele Prize Award Helgason, S. First published in the Notices of the American Mathematical Society in Vol.35, 1988, published by the American Mathematical Society Fri, 01 Jan 1988 00:00:00 GMT http://hdl.handle.net/1721.1/26690 1988-01-01T00:00:00Z Invariant differential equations on homogeneous manifolds http://hdl.handle.net/1721.1/26689 Invariant differential equations on homogeneous manifolds Helgason, S. First published in the Bulletin of the American Mathematical Society in Vol.83, 1977, published by the American Mathematical Society Sat, 01 Jan 1977 00:00:00 GMT http://hdl.handle.net/1721.1/26689 1977-01-01T00:00:00Z Paley-Wiener theorems and surjectivity of invariant differential operators on symmetric spaces and Lie groups http://hdl.handle.net/1721.1/26688 Paley-Wiener theorems and surjectivity of invariant differential operators on symmetric spaces and Lie groups Helgason, S. First published in the Bulletin of the American Mathematical Society in Vol.79, 1973, published by the American Mathematical Society Mon, 01 Jan 1973 00:00:00 GMT http://hdl.handle.net/1721.1/26688 1973-01-01T00:00:00Z