Cassius Jackson Keyser

Cassius Jackson Keyser ( born May 15, 1862 in Rawson, Ohio ( USA); † May 8, 1947 in New York City ) was an American mathematician.

Life

His father Jacob B. Keyser, was a farmer, and his mother Margaret Jane (nee Ryan ) ran the household. Cassius and his three siblings Charlotte, Calvin and Alonzo went in the neighboring Union in the school until the family moved in the 1870s, according to Hardin.

1879 Keyser joined the University " Northwest Ohio Normal School " (now Ohio Northern University ) in Ada ( Ohio). He reached a scientific degree and was selected to speak at the closing ceremony to the graduates a speech where he talked about reason and faith. He married a fellow student, Ella Maud Crow from Ridgeway, Ohio on August 19, 1885.

After completing Keyser resigned his work as a school principal in Ridgeway, Ohio, and then got a position in Plattsburg, Missouri. He taught mathematics at the University of Missouri and reached the rank of Bachelor at this faculty. After brief appointments as a mathematics teaching assistant at the " New York State Normal School " (New Paltz, New York) and at Washington University (St. Louis) Keyser continued his education at Columbia University in New York City continues. He obtained in 1896 a Master's (Master) and 1901 doctorate in mathematics. His other interests included geometry, history and philosophy.

Keyser's affiliation with the Columbia University had long about reaching his title out. He was there teaching assistant for mathematics (1900-1903), and Professor of Mathematics ( 1903-1927 ). He also served as chairman of the Faculty of Mathematics ( 1910-1916 ). Among the students he was admired as a careful teacher, even if he was " a bit old fashioned in its style and a little awkward " was. During the time at this university he held a seminar on then come out work " Principia Mathematica ". In the audience of the mathematician and logician Emil Post sat.

Keyser finished its work in 1927 and retired. He died at the age of almost 85 years on May 8, 1947 in his home in New York City. His obituary appeared in the New York Times on May 9. A group of friends and colleagues formed the Society of Friends Cassius Keyser, whose aim was to publish his work unknown. The first issue appeared on his 85th birthday, a week after his death.

Work

Keyser was during his academic career, a successful author and lecturer, especially in the field of mathematics philosophy. Among his more than 50 works were titles such as " Mathematical Philosophy: A Study of Fate and Freedom ( reading for the educated layman ) ", " The human value of rigorous thinking" and "Mathematics and the question of the cosmic brain ". James R. Newman integrated Keyser's work " group concept " in its four -part classic " The World of Mathematics" as one of two articles on group theory. General Semantics, the area that examines the foundations of the structure of mathematics and the natural sciences and attempts to adapt these structures of human approach was introduced by Alfred Korzybski in 1933 in his work " science and reason ". Korzybski praised Keyser, a great influence on him and the beginnings of semantics to have possessed.

Keyser was, with his university colleague John Dewey, one of the members of the organizing committee of the "American Association of University Professors " ( American Association of University Professors ), which today has over 45,000 members. He was also co-author of " Scripta Mathematica " and worked in 1906 as a writer for the "Encyclopedia Americana " and the " Hibbert Journal".

Pictures of Cassius Jackson Keyser

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