9 articles
Boris Tsirelson
Boris Tsirelson (Борис Цирельсон, 1950–2020) was a Russian-born Israeli mathematician at Tel Aviv University known for Tsirelson's bound in quantum mechanics and Tsirelson's space in Banach space theory.
Charles Loewner
Charles Loewner, born Karel Löwner and earlier publishing as Karl Löwner, was a Czech-American mathematician who introduced the Loewner equation in 1923 and ended his career at Stanford University.
Christer Borell
Christer Borell is a Swedish mathematician at Chalmers University of Technology who proved the Gaussian isoperimetric inequality in 1975 and whose noise-stability theorem underpins hardness-of-approximation results.
Eduard Helly
Eduard Helly was an Austrian mathematician (1884–1943) known for Helly's theorem in convex geometry, the Helly selection principle, and a 1912 forerunner of the Hahn–Banach theorem.
John Williams Calkin
John Williams Calkin (1909–1964) was an American mathematician whose 1941 paper on ideals of bounded operators founded operator ideal theory and introduced the quotient algebra called the Calkin algebra.
Naum Akhiezer
Naum Akhiezer (Наум Ілліч Ахієзер) was a Soviet and Ukrainian mathematician who worked in approximation theory and the moment problem in Kharkiv, giving his name to the Akhiezer polynomials.
Otto Toeplitz
Otto Toeplitz (1881–1940) was a German mathematician, born in Breslau, who introduced Toeplitz matrices in 1911, helped build the German school of functional analysis, and posed the inscribed-square conjecture.
Stanisław Ruziewicz
Stanisław Ruziewicz (1889–1941) was a Polish mathematician of the Lwów School of Mathematics, professor at Jan Kazimierz University in Lwów and namesake of the Ruziewicz problem on invariant measures on spheres.
Werner Fenchel
Werner Fenchel (1905–1988) was a German-born Danish mathematician who co-founded convex analysis, the basis of modern optimization, and co-created the Fenchel–Nielsen coordinates parametrizing Teichmüller space.