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Virgil Snyder
right Virgil Snyder (1869, Dixon, Iowa – 1950) was an American mathematician, specializing in algebraic geometry. In 1886 Snyder matriculated at Iowa State College and graduated with a bachelor's degree in 1889. He attended Cornell University as a graduate student from 1890 to 1892, leaving to study mathematics in Germany on an Erastus W. Brooks fellowship. In 1895 he received a doctorate from the University of Göttingen under Felix Klein. In 1895 Snyder returned to Cornell as an instructor, becoming an assistant professor in 1905 and a full professor in 1910. In 1938 he retired as professor emeritus, having supervised 39 doctoral students, 13 of whom were women. Of these students, perhaps the most well known is C. L. E. Moore. Snyder served as president of the American Mathematical Society for a two-year term in 1927 and 1928. He was an Invited Speaker of the International Congress of Mathematicians in 1928 at Bologna, in 1932 at Zurich, and in 1936 at Oslo. Snyder did re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virgil Snyder
right Virgil Snyder (1869, Dixon, Iowa – 1950) was an American mathematician, specializing in algebraic geometry. In 1886 Snyder matriculated at Iowa State College and graduated with a bachelor's degree in 1889. He attended Cornell University as a graduate student from 1890 to 1892, leaving to study mathematics in Germany on an Erastus W. Brooks fellowship. In 1895 he received a doctorate from the University of Göttingen under Felix Klein. In 1895 Snyder returned to Cornell as an instructor, becoming an assistant professor in 1905 and a full professor in 1910. In 1938 he retired as professor emeritus, having supervised 39 doctoral students, 13 of whom were women. Of these students, perhaps the most well known is C. L. E. Moore. Snyder served as president of the American Mathematical Society for a two-year term in 1927 and 1928. He was an Invited Speaker of the International Congress of Mathematicians in 1928 at Bologna, in 1932 at Zurich, and in 1936 at Oslo. Snyder did re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruled Surface
In geometry, a surface is ruled (also called a scroll) if through every point of there is a straight line that lies on . Examples include the plane, the lateral surface of a cylinder or cone, a conical surface with elliptical directrix, the right conoid, the helicoid, and the tangent developable of a smooth curve in space. A ruled surface can be described as the set of points swept by a moving straight line. For example, a cone is formed by keeping one point of a line fixed whilst moving another point along a circle. A surface is ''doubly ruled'' if through every one of its points there are two distinct lines that lie on the surface. The hyperbolic paraboloid and the hyperboloid of one sheet are doubly ruled surfaces. The plane is the only surface which contains at least three distinct lines through each of its points . The properties of being ruled or doubly ruled are preserved by projective maps, and therefore are concepts of projective geometry. In algebraic geometry, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1869 Births
Events January–March * January 3 – Abdur Rahman Khan is defeated at Tinah Khan, and exiled from Afghanistan. * January 5 – Scotland's oldest professional football team, Kilmarnock F.C., is founded. * January 20 – Elizabeth Cady Stanton is the first woman to testify before the United States Congress. * January 21 – The P.E.O. Sisterhood, a philanthropic educational organization for women, is founded at Iowa Wesleyan College in Mount Pleasant, Iowa. * January 27 – The Republic of Ezo is proclaimed on the northern Japanese island of Ezo (which will be renamed Hokkaidō on September 20) by remaining adherents to the Tokugawa shogunate. * February 5 – Prospectors in Moliagul, Victoria, Australia, discover the largest alluvial gold nugget ever found, known as the "Welcome Stranger". * February 20 – Ranavalona II, the Merina Queen of Madagascar, is baptized. * February 25 – The Iron and Steel Institute is formed in Lon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
