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Sigurdur Helgason (mathematician)
Sigurdur Helgason may refer to: * Sigurdur Helgason (airline executive) (1921–2009), innovator in low-cost airlines * Sigurður Helgason (mathematician) Sigurdur Helgason (born 30 September 1927; Icelandic: ''Sigurður'') is an Icelandic mathematician whose research has been devoted to the geometry and analysis on symmetric spaces. In particular, he has used new integral geometric methods to esta ... (born 1927), Icelandic mathematician * Sigurður Helgason (basketball) (born 1940), Icelandic basketball player and coach {{hndis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigurdur Helgason (airline Executive)
Sigurður Helgason (July 20, 1921 – February 8, 2009) was an innovator in low-cost airlines. Helgason is credited with pioneering the "hippie airline", Loftleiðir, that made low-cost air travel to Europe possible for generations of Americans. Biography Born July 20, 1921, in the Icelandic capital, Reykjavík, Sigurður Helgason came to the United States in his 20s and graduated with a business degree from Columbia University in New York in 1947. He then returned to Iceland, where he managed a cement company. In 1953, Helgason joined the board of Loftleiðir, a small airline that had been formed by three pilots nine years earlier. At the time, the International Air Transport Association (IATA) controlled its members' fares. As a non-member, Loftleiðir, or Icelandic Airlines in English, was able to significantly undercut other transatlantic carriers' pricing, and it began service from New York to Luxembourg in 1955. According to Guðjón Arngrímsson, Icelandair's former Vi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigurður Helgason (mathematician)
Sigurdur Helgason (born 30 September 1927; Icelandic: ''Sigurður'') is an Icelandic mathematician whose research has been devoted to the geometry and analysis on symmetric spaces. In particular, he has 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. He was born in Akureyri, Iceland. In 1954, he earned a PhD from Princeton University under Salomon Bochner. Since 1965, Helgason has been a professor of mathematics at the Massachusetts Institute of Technology. He was winner of the 1988 Leroy P. Steele Prize for Seminal Contributions for his books ''Groups and Geometric Analysis'' and ''Differential Geometry, Lie Groups and Symmetri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |