Edward Kasner facts for kids
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Edward Kasner



Photograph of Kasner dated 1907.


Born  New York City, United States

April 2, 1878
Died  January 7, 1955 (aged 76) New York City, United States

Nationality  American 
Alma mater  City College of New York (BA) Columbia University (MA, PhD) 
Known for  Kasner metric Kasner polygon "googol" 
Scientific career  
Fields  Mathematics 
Institutions  Columbia University 
Doctoral advisor  Felix Klein David Hilbert 
Doctoral students  Rufus Isaacs Joseph Ritt Jesse Douglas Edna Kramer 
Edward Kasner (April 2, 1878 – January 7, 1955) was an American mathematician who was appointed Tutor on Mathematics in the Columbia University Mathematics Department. Kasner was the first Jewish person appointed to a faculty position in the sciences at Columbia University. Subsequently, he became an adjunct professor in 1906, and a full professor in 1910, at the university. Differential geometry was his main field of study. In addition to introducing the term "googol", he is known also for the Kasner metric and the Kasner polygon.
Education
Kasner's 1899 PhD dissertation at Columbia University was titled The Invariant Theory of the Inversion Group: Geometry upon a Quadric Surface; it was published by the American Mathematical Society in 1900 in their Transactions.
Googol and googolplex
Kasner is perhaps best remembered today for introducing the term "googol." In order to pique the interest of children, Kasner sought a name for a very large number: one followed by 100 zeros. On a walk in the New Jersey Palisades with his nephews, Milton (1911–1981) and Edwin Sirotta, Kasner asked for their ideas. Nineyearold Milton suggested "googol".
In 1940, with James R. Newman, Kasner cowrote a nontechnical book surveying the field of mathematics, called Mathematics and the Imagination (ISBN: 0486417034).
The Internet search engine "Google" originated from a misspelling of "googol", and the "Googleplex" (the Google company headquarters in Mountain View, California) is similarly derived from googolplex.
Personal life
Kasner was Jewish and was the son of Austrian immigrants.
Works
 Kasner, E. (1900). "The Invariant Theory of the Inversion Group: Geometry Upon a Quadric Surface". Transactions of the American Mathematical Society 1 (4): 430–498. doi:10.1090/S00029947190015005501. http://name.umdl.umich.edu/ABV0510.0001.001.
 Kasner, Edward (1980). "Differentialgeometric aspects of dynamics". In C. Carpelan. The Logarithmic potential and other monographs. New York: Chelsea. pp. 235–263. ISBN 0828403058.
 Kasner, Edward; Newman, James R. (April 2001). Mathematics and the Imagination. Dover Pubns. ISBN 0486417034.
 Edward Kasner and James R. Newman, Mathematics and the Imagination, Tempus Books of Microsoft Press, 1989. ISBN: 1556151047
 Kasner, Edward (July 1914). "The Ratio of the Arc to the Chord of an Analytic Curve Need Not Be Unity". Bulletin of the American Mathematical Society 20 (10): 524–31. doi:10.1090/S000299041914025455.
 Kasner, Edward (1921). "Geometrical theorems on Einstein's cosmological equations". Amer. J. Math. (The Johns Hopkins University Press) 43 (4): 217–221. doi:10.2307/2370192.
See also
In Spanish: Edward Kasner para niños