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Germund Gunnar Dahlquist, född 16 januari … Germund Gunnar Dahlquist, född 16 januari 1925 i Uppsala, död 8 februari 2005 i Stockholm, var en svensk pionjär inom datorstödda beräkningar och professor i numerisk analys.Han var son till missionsdirektorn Gunnar Dahlquist och författaren Siri Dahlquist, född Jonsson samt yngre bror till filosofen Thorild Dahlquist. Dahlquist började studera matematik vid Stockholms högskola 1942, och tog intryck av Harald Bohr som var en av hans lärare. Dahlquist blev 1949 filosofie licentiat på avhandlingen On the Analytic Continuation of Eulerian Products. Från 1949 till 1959 var han verksam vid Matematikmaskinnämnden, där han deltog i utvecklingen av BESK. Doktorsavhandlingen Stability and Error Bounds in the Numerical Solution of Ordinary Differential Equations lades fram 1958. Hans handledare var Fritz Carlson och Lars Hörmander. Dahlquist var en av de första som någonsin publicerade sig i den vetenskapliga tidskriften BIT Numerical Mathematics, och Carl-Erik Fröberg sammanfattar hans gärning med att han "bidrog med flera nyskapande artiklar med fokus på numeriska lösningar av differentialekvationer". Dahlquist blev 1963 professor i numerisk analys på en professur som var gemensam för Kungliga Tekniska högskolan och Stockholms universitet, och räknas därför som grundare av den gemensamma institutionen NADA. Han stannade på professuren till sin pensionering 1990, men var gästprofessor vid Stanford University 1982 till 1986. Dahlquist invaldes 1965 som ledamot av Kungl. Ingenjörsvetenskapsakademien. Tillsammans med bland andra Lars Erik Zachrisson var han med och startade Institutet för tillämpad matematik. Germund Dahlquist är begravd på Skogskyrkogården i Stockholm.r begravd på Skogskyrkogården i Stockholm.
, Germund Dahlquist (né le 16 janvier 1925 à Uppsala et mort le 8 février 2005 à Stockholm) est un mathématicien suédois, connu principalement pour ses contributions à la théorie de l'analyse numérique appliquée aux équations différentielles.
, Germund Dahlquist (16 de janeiro de 1925 — 8 de fevereiro de 2005) foi um matemático sueco. É conhecido principalmente por suas contribuições à teoria da análise numérica aplicada a equações diferenciais.
, Germund Dahlquist (16 January 1925 – 8 Feb … Germund Dahlquist (16 January 1925 – 8 February 2005) was a Swedish mathematician known primarily for his early contributions to the theory of numerical analysis as applied to differential equations. Dahlquist began to study mathematics at Stockholm University in 1942 at the age of 17, where he cites the Danish mathematician Harald Bohr (who was living in exile after the occupation of Denmark during World War II) as a profound influence. He received the degree of licentiat from Stockholm University in 1949, before taking a break from his studies to work at the Swedish Board of Computer Machinery (Matematikmaskinnämnden), working on (among other things) the early computer BESK, Sweden's first. During this time, he also worked with Carl-Gustaf Rossby on early numerical weather forecasts. Dahlquist returned to Stockholm University to complete his Ph.D., Stability and Error Bounds in the Numerical Solution of Ordinary Differential Equations, which he defended in 1958, with Fritz Carlson and Lars Hörmander as his advisors. As part of this work he introduced the logarithmic norm (also introduced by Russian mathematician the same year). In 1959 he moved to the Royal Institute of Technology (KTH), where he would later establish what became the Department of Numerical Analysis and Computer Science (NADA) in 1962 (now part of the School of Computer Science and Communication), and become Sweden's first Professor of Numerical Analysis in 1963. He helped establish the Nordic journal of numerical analysis, BIT, in 1961. In 1965 he was elected into the Royal Swedish Academy of Engineering Sciences (IVA). The software package COMSOL Multiphysics, for finite element analysis of partial differential equations, was started by a couple of Dahlquist's graduate students based upon codes developed for a graduate course at KTH.es developed for a graduate course at KTH.
, Germund Dahlquist (* 16. Januar 1925 in Up … Germund Dahlquist (* 16. Januar 1925 in Uppsala; † 8. Februar 2005 in Stockholm) war ein schwedischer Mathematiker aus dem Bereich der numerischen Mathematik. Er leistete bahnbrechende Beiträge zur Theorie der numerischen Lösung von Anfangswertproblemen, insbesondere zum Thema Stabilität.blemen, insbesondere zum Thema Stabilität.
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Germund Gunnar Dahlquist, född 16 januari … Germund Gunnar Dahlquist, född 16 januari 1925 i Uppsala, död 8 februari 2005 i Stockholm, var en svensk pionjär inom datorstödda beräkningar och professor i numerisk analys.Han var son till missionsdirektorn Gunnar Dahlquist och författaren Siri Dahlquist, född Jonsson samt yngre bror till filosofen Thorild Dahlquist. Dahlquist var en av de första som någonsin publicerade sig i den vetenskapliga tidskriften BIT Numerical Mathematics, och Carl-Erik Fröberg sammanfattar hans gärning med att han "bidrog med flera nyskapande artiklar med fokus på numeriska lösningar av differentialekvationer".iska lösningar av differentialekvationer".
, Germund Dahlquist (* 16. Januar 1925 in Up … Germund Dahlquist (* 16. Januar 1925 in Uppsala; † 8. Februar 2005 in Stockholm) war ein schwedischer Mathematiker aus dem Bereich der numerischen Mathematik. Er leistete bahnbrechende Beiträge zur Theorie der numerischen Lösung von Anfangswertproblemen, insbesondere zum Thema Stabilität.blemen, insbesondere zum Thema Stabilität.
, Germund Dahlquist (16 January 1925 – 8 Feb … Germund Dahlquist (16 January 1925 – 8 February 2005) was a Swedish mathematician known primarily for his early contributions to the theory of numerical analysis as applied to differential equations. Dahlquist began to study mathematics at Stockholm University in 1942 at the age of 17, where he cites the Danish mathematician Harald Bohr (who was living in exile after the occupation of Denmark during World War II) as a profound influence.ing World War II) as a profound influence.
, Germund Dahlquist (16 de janeiro de 1925 — 8 de fevereiro de 2005) foi um matemático sueco. É conhecido principalmente por suas contribuições à teoria da análise numérica aplicada a equações diferenciais.
, Germund Dahlquist (né le 16 janvier 1925 à Uppsala et mort le 8 février 2005 à Stockholm) est un mathématicien suédois, connu principalement pour ses contributions à la théorie de l'analyse numérique appliquée aux équations différentielles.
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