Sigurður Helgason
Icelandic mathematician (1927-2023) · Iceland · On the map · Academics · Died at 96
Sigurdur Helgason was an Icelandic mathematician whose research has been devoted to the geometry and analysis on symmetric spaces.
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A typical day, 30 days to 23 August 2026
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In particular, he used new integral geometric methods to establish fundamental existence theorems for differential equations on symmetric spaces as well as some new results on the representations of their isometry groups. He also introduced a Fourier transform on these spaces and proved the principal theorems for this transform, the inversion formula, the Plancherel theorem and the analog of the Paley-Wiener theorem.
