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Ehrenpreis Des österreichischen Buchhandels Für Toleranz In Denken Und Handeln
Ehrenpreis is a surname. Notable people with the surname include: *Leon Ehrenpreis (1930–2010), American mathematician **Ehrenpreis conjecture **Malgrange–Ehrenpreis theorem * Mordecai Ehrenpreis, (1869–1951), Polish-Swedish rabbi See also *Veronica (plant) ''Veronica'' is the largest genus in the flowering plant family Plantaginaceae, with about 500 species. It was formerly classified in the family Scrophulariaceae. Common names include speedwell, bird's eye, and gypsyweed. Taxonomy for this genus ..., German name: Ehrenpreis {{surname, Ehrenpreis German-language surnames ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leon Ehrenpreis
Eliezer 'Leon' Ehrenpreis (May 22, 1930 – August 16, 2010, Brooklyn) was a mathematician at Temple University who proved the Malgrange–Ehrenpreis theorem, the fundamental theorem about differential operators with constant coefficients. He previously held tenured positions at Yeshiva University and at the Courant Institute at New York University. Early life and education Leon was born in New York City to a family of Jewish immigrants from Eastern Europe. He graduated from Stuyvesant High School and studied Mathematics as an undergraduate at City College of New York. Afterward, he enrolled as a doctoral student at Columbia University where he studied under mathematician Claude Chevalley, obtaining his PhD in 1953 at the age of 23. His doctoral thesis was entitled "Theory of Distributions in Locally Compact Spaces". Religion Ehrenpreis was also a Rabbi, having received his ordination from the renowned Rabbi Moshe Feinstein. He was the author of a work on the Chumash and other re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ehrenpreis Conjecture
In mathematics, the Ehrenpreis conjecture of Leon Ehrenpreis states that for any ''K'' greater than 1, any two closed Riemann surfaces of genus at least 2 have finite-degree covers which are ''K''-quasiconformal: that is, the covers are arbitrarily close in the Teichmüller metric. A proof was announced by Jeremy Kahn and Vladimir Markovic in January 2011, using their proof of the Surface subgroup conjecture and a newly developed "good pants homology" theory. In June 2012, Kahn and Markovic were given the Clay Research Awards for their work on these two problems by the Clay Mathematics Institute at a ceremony at Oxford University. See also * Surface subgroup conjecture * Virtually Haken conjecture * Virtually fibered conjecture In the mathematical subfield of 3-manifolds, the virtually fibered conjecture, formulated by American mathematician William Thurston, states that every closed, irreducible, atoroidal 3-manifold with infinite fundamental group has a finite cover whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malgrange–Ehrenpreis Theorem
In mathematics, the Malgrange–Ehrenpreis theorem states that every non-zero linear differential operator with constant coefficients has a Green's function. It was first proved independently by and . This means that the differential equation :P\left(\frac, \ldots, \frac \right) u(\mathbf) = \delta(\mathbf), where ''P'' is a polynomial in several variables and ''δ'' is the Dirac delta function, has a distributional solution ''u''. It can be used to show that :P\left(\frac, \ldots, \frac \right) u(\mathbf) = f(\mathbf) has a solution for any compactly supported distribution ''f''. The solution is not unique in general. The analogue for differential operators whose coefficients are polynomials (rather than constants) is false: see Lewy's example. Proofs The original proofs of Malgrange and Ehrenpreis were non-constructive as they used the Hahn–Banach theorem. Since then several constructive proofs have been found. There is a very short proof using the Fourier transform ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mordecai Ehrenpreis
Mordecai Ehrenpreis (25 June 1869 – 26 February 1951) was a Hebrew author, publisher and Zionist activist. From 1914 until his death he served as chief rabbi of Stockholm. Biography Mordechai (Marcus) Ehrenpreis was born in Lviv. As a young man, he wrote in Yiddish. He studied at German universities and the Hochschule für die Wissenschaft des Judentums in Berlin. From 1884 he wrote for the Hebrew newspapers ''Ha-Maggid'' and ''Ha-Meliz''. From 1896 to 1900 he was a rabbi in Đakovo, Croatia. Even before Herzl, Ehrenpreis, Nathan Birnbaum and others began to define the concept of a new national Judaism. Ehrenpreis died in 1951 in Saltsjöbaden, Sweden. Zionist activism Ehrenpreis was an early adherent of Zionism and helped Herzl establish the first Zionist Congress. He was a member of the Democratic Fraction, an opposition group at the Zionist Congress that lobbied for cultural as opposed to political Zionism. Ehrenpreis ultimately supported both views and wrote "Perhaps ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Veronica (plant)
''Veronica'' is the largest genus in the flowering plant family Plantaginaceae, with about 500 species. It was formerly classified in the family Scrophulariaceae. Common names include speedwell, bird's eye, and gypsyweed. Taxonomy for this genus is currently being reanalysed, with the genus '' Hebe'' and the related Australasian genera '' Derwentia'', ''Detzneria'', ''Chionohebe'', ''Heliohebe'', ''Leonohebe'' and ''Parahebe'' now included by many botanists. Monophyly of the genus is supported by nuclear ribosomal internal transcribed spacer (ITS) and cpDNA. The taxa of the genus are herbaceous annuals or perennials, and also subshrubs, shrubs or small trees if ''Hebe'' is included. Most of the species are from the temperate Northern Hemisphere, though with some species from the Southern Hemisphere; ''Hebe'' is mostly from New Zealand. Taxonomy The genus name ''Veronica'' used in binomial nomenclature was chosen by Carl Linnaeus based on preexisting common usage of the name v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
