Ivar Stakgold

Ivar Stakgold (December 13, 1925 – May 29, 2018) was a Norwegian-born American academic mathematician and bridge player from Newark, Delaware. As the sole author of two books he specialized in boundary value problems (LCSH).

Stakgold was born in Oslo, Norway to parents with Russian-Jewish heritage. He studied applied mathematics at Harvard University and earned the Ph.D. in 1949 with a dissertation, The Cauchy Relations In A Molecular Theory of Elasticity, under Léon Nicolas Brillouin. He was professor emeritus of mathematical sciences at the University of Delaware and a researcher at the University of California, San Diego. He was a former president of the Society for Industrial and Applied Mathematics (SIAM).

• Boundary Value Problems of Mathematical Physics, 2 vols. (Macmillan, 1967), Macmillan series in advanced mathematics and theoretical physics, LCCN 67-10304; reprint 2000, SIAM Classics in applied mathematics, no. 29
• Nonlinear Problems in the Physical Sciences and Biology: proceedings of a Battelle Summer Institute, Seattle, July 3–28, 1972, eds. Stakgold and others (Springer-Verlag, 1973), LCCN 73-78428
• Green's Functions and Boundary Value Problems (Wiley, 1979); 2nd ed. 1998; 3rd ed. 2011, Stakgold and Michael J. Holst
• Analytical and Computational Methods in Scattering and Applied Mathematics, eds. Fadil Santosa and Stakgold (Chapman & Hall/CRC, 2000) – "A volume to the memory of Ralph Ellis Kleinman", LCCN 99-87683

• Nonlinear Problems in Applied Mathematics: in honor of Ivar Stakgold on his 70th birthday, eds. T.S. Angell and others (Philadelphia:SIAM, 1996), LCCN 96-112982

• Mott-Smith Trophy (1) 1958

• North American Bridge Championships (5)
  • Silodor Open Pairs (1) 1958
  • Vanderbilt (1) 1958
  • Chicago Mixed Board-a-Match (1) 1969
  • Reisinger (1) 1958
  • Spingold (1) 1962

• Bermuda Bowl (1) 1959
• North American Bridge Championships
  • Silodor Open Pairs (1) 1963
  • Mitchell Board-a-Match Teams (1) 1957
  • Spingold (1) 1958