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Herbert Robbins
Herbert Ellis Robbins (January 12, 1915 – February 12, 2001) was an American mathematician and statistician. He did research in topology, measure theory, statistics, and a variety of other fields. He was the co-author, with Richard Courant, of '' What is Mathematics?'', a popularization that is still () in print. The Robbins lemma, used in empirical Bayes methods, is named after him. Robbins algebras are named after him because of a conjecture (since proved) that he posed concerning Boolean algebras. The Robbins theorem, in graph theory, is also named after him, as is the Whitney–Robbins synthesis, a tool he introduced to prove this theorem. The well-known unsolved problem of minimizing in sequential selection the expected rank of the selected item under full information, sometimes referred to as the fourth secretary problem, also bears his name: Robbins' problem (of optimal stopping). Biography Robbins was born in New Castle, Pennsylvania. As an undergraduate, Rob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Castle, Pennsylvania
New Castle is a city in Lawrence County, Pennsylvania, United States, and the county seat of Lawrence County. It is northwest of Pittsburgh, and near the Pennsylvania–Ohio border, just southeast of Youngstown, Ohio. As of the 2020 U.S. Census, the city had a population of 21,926. It is the commercial center of a fertile agricultural region, officially the New Castle micropolitan area, which had a population of 86,070 in 2020. New Castle also anchors the northwestern part of the Pittsburgh-New Castle-Weirton combined area. History In 1798, John Carlysle Stewart, a civil engineer, traveled to western Pennsylvania to resurvey the "donation lands", which had been reserved for veterans of the Revolutionary War. He discovered that the original survey had neglected to stake out approximately at the confluence of the Shenango River and Neshannock Creek, at that time a part of Allegheny County. The Indian town of Kuskusky was listed on early maps in this location. Claiming the land ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Courant
Richard Courant (January 8, 1888 – January 27, 1972) was a German American mathematician. He is best known by the general public for the book '' What is Mathematics?'', co-written with Herbert Robbins. His research focused on the areas of real analysis, mathematical physics, the calculus of variations and partial differential equations. He wrote textbooks widely used by generations of students of physics and mathematics. He is also known for founding the institute now bearing his name. Life and career Courant was born in Lublinitz, in the Prussian Province of Silesia. His parents were Siegmund Courant and Martha Courant ''née'' Freund of Oels. Edith Stein was Richard's cousin on the paternal side. During his youth his parents moved often, including to Glatz, then to Breslau and in 1905 to Berlin. He stayed in Breslau and entered the university there, then continued his studies at the University of Zürich and the University of Göttingen. He became David Hilbert's assist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
