Herbert Busemann
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Herbert Busemann (12 May 1905 – 3 February 1994) was a
German-American German Americans (, ) are Americans who have full or partial German ancestry. According to the United States Census Bureau's figures from 2022, German Americans make up roughly 41 million people in the US, which is approximately 12% of the pop ...
mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, mathematical structure, structure, space, Mathematica ...
specializing in
convex Convex or convexity may refer to: Science and technology * Convex lens, in optics Mathematics * Convex set, containing the whole line segment that joins points ** Convex polygon, a polygon which encloses a convex set of points ** Convex polytop ...
and
differential geometry Differential geometry is a Mathematics, mathematical discipline that studies the geometry of smooth shapes and smooth spaces, otherwise known as smooth manifolds. It uses the techniques of Calculus, single variable calculus, vector calculus, lin ...
. He is the author of Busemann's theorem in
Euclidean geometry Euclidean geometry is a mathematical system attributed to ancient Greek mathematics, Greek mathematician Euclid, which he described in his textbook on geometry, ''Euclid's Elements, Elements''. Euclid's approach consists in assuming a small set ...
and geometric tomography. He was a member of the Royal Danish Academy and a winner of the Lobachevsky Medal (1985), the first American mathematician to receive it. He was also a
Fulbright scholar The Fulbright Program, including the Fulbright–Hays Program, is one of several United States cultural exchange programs with the goal of improving intercultural relations, cultural diplomacy, and intercultural competence between the peopl ...
in
New Zealand New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...
in 1952.


Biography

Herbert Busemann was born in
Berlin Berlin ( ; ) is the Capital of Germany, capital and largest city of Germany, by both area and List of cities in Germany by population, population. With 3.7 million inhabitants, it has the List of cities in the European Union by population withi ...
to a well-to-do family. His father, Alfred Busemann, was a director of
Krupp Friedrich Krupp AG Hoesch-Krupp (formerly Fried. Krupp AG and Friedrich Krupp GmbH), trade name, trading as Krupp, was the largest company in Europe at the beginning of the 20th century as well as Germany's premier weapons manufacturer dur ...
, where Busemann also worked for several years. He studied at
University of Munich The Ludwig Maximilian University of Munich (simply University of Munich, LMU or LMU Munich; ) is a public university, public research university in Munich, Bavaria, Germany. Originally established as the University of Ingolstadt in 1472 by Duke ...
,
Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...
, and
Rome Rome (Italian language, Italian and , ) is the capital city and most populated (municipality) of Italy. It is also the administrative centre of the Lazio Regions of Italy, region and of the Metropolitan City of Rome. A special named with 2, ...
. He defended his dissertation in
University of Göttingen The University of Göttingen, officially the Georg August University of Göttingen (, commonly referred to as Georgia Augusta), is a Public university, public research university in the city of Göttingen, Lower Saxony, Germany. Founded in 1734 ...
in 1931, where his advisor was
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 ...
. He remained in
Göttingen Göttingen (, ; ; ) is a college town, university city in Lower Saxony, central Germany, the Capital (political), capital of Göttingen (district), the eponymous district. The River Leine runs through it. According to the 2022 German census, t ...
as an assistant until 1933, when he escaped
Nazi Germany Nazi Germany, officially known as the German Reich and later the Greater German Reich, was the German Reich, German state between 1933 and 1945, when Adolf Hitler and the Nazi Party controlled the country, transforming it into a Totalit ...
to
Copenhagen Copenhagen ( ) is the capital and most populous city of Denmark, with a population of 1.4 million in the Urban area of Copenhagen, urban area. The city is situated on the islands of Zealand and Amager, separated from Malmö, Sweden, by the ...
(he had a Jewish grandfather). He worked at the
University of Copenhagen The University of Copenhagen (, KU) is a public university, public research university in Copenhagen, Copenhagen, Denmark. Founded in 1479, the University of Copenhagen is the second-oldest university in Scandinavia, after Uppsala University. ...
until 1936, when he left to the
United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
. There, he got married in 1939 and naturalized in 1943. He had temporary positions at the
Institute for Advanced Study The Institute for Advanced Study (IAS) is an independent center for theoretical research and intellectual inquiry located in Princeton, New Jersey. It has served as the academic home of internationally preeminent scholars, including Albert Ein ...
,
Johns Hopkins University The Johns Hopkins University (often abbreviated as Johns Hopkins, Hopkins, or JHU) is a private university, private research university in Baltimore, Maryland, United States. Founded in 1876 based on the European research institution model, J ...
,
Illinois Institute of Technology The Illinois Institute of Technology, commonly referred to as Illinois Tech and IIT, is a Private university, private research university in Chicago, Illinois, United States. Tracing its history to 1890, the present name was adopted upon the m ...
,
Smith College Smith College is a Private university, private Liberal arts colleges in the United States, liberal arts Women's colleges in the United States, women's college in Northampton, Massachusetts, United States. It was chartered in 1871 by Sophia Smit ...
, and eventually became a professor in 1947 at
University of Southern California The University of Southern California (USC, SC, or Southern Cal) is a Private university, private research university in Los Angeles, California, United States. Founded in 1880 by Robert M. Widney, it is the oldest private research university in ...
. He advanced to a distinguished professor in 1964, and continued working at USC until his retirement in 1970. Over the course of his work at USC, he supervised over 10 Ph.D. students. He is the author of six monographs, two of which were translated into Russian. He received Lobachevsky Medal in 1985 for his book ''The geometry of geodesics''. Busemann was also an active mathematical citizen. At different times, he was the president of the
California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
chapter of
Mathematical Association of America The Mathematical Association of America (MAA) is a professional society that focuses on mathematics accessible at the undergraduate level. Members include university A university () is an educational institution, institution of tertiary edu ...
, and a member of the council of the
American Mathematical Society The American Mathematical Society (AMS) is an association of professional mathematicians dedicated to the interests of mathematical research and scholarship, and serves the national and international community through its publications, meetings, ...
. Busemann was also an accomplished linguist; he was able to read and speak in French,
German German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also Ge ...
,
Spanish Spanish might refer to: * Items from or related to Spain: **Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many countries in the Americas **Spanish cuisine **Spanish history **Spanish culture ...
,
Italian Italian(s) may refer to: * Anything of, from, or related to the people of Italy over the centuries ** Italians, a Romance ethnic group related to or simply a citizen of the Italian Republic or Italian Kingdom ** Italian language, a Romance languag ...
,
Russian Russian(s) may refer to: *Russians (), an ethnic group of the East Slavic peoples, primarily living in Russia and neighboring countries *A citizen of Russia *Russian language, the most widely spoken of the Slavic languages *''The Russians'', a b ...
, and Danish. He could also read
Arabic Arabic (, , or , ) is a Central Semitic languages, Central Semitic language of the Afroasiatic languages, Afroasiatic language family spoken primarily in the Arab world. The International Organization for Standardization (ISO) assigns lang ...
,
Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
,
Greek Greek may refer to: Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group *Greek language, a branch of the Indo-European language family **Proto-Greek language, the assumed last common ancestor of all kno ...
and Swedish. He translated a number of papers and monograph, most notably from
Russian Russian(s) may refer to: *Russians (), an ethnic group of the East Slavic peoples, primarily living in Russia and neighboring countries *A citizen of Russia *Russian language, the most widely spoken of the Slavic languages *''The Russians'', a b ...
, a rare language at the time. He was also an accomplished artist and had several public exhibitions of his
Hard-edge painting Hard-edge painting (also referred to as Hard Edge or Hard-edged) is painting in which abrupt transitions are found between color areas. Color areas often consist of one unvarying color. The Hard-edge painting style is related to Geometric abstra ...
s]. He died in
Santa Ynez, California Santa Ynez ( ; Spanish for "St. Agnes", originally spelled ''Santa Inés'') is an unincorporated community in the Santa Ynez Valley of Santa Barbara County, California, United States. The population was 4,505 at the 2020 census, up from 4,418 ...
on February 3, 1994, at the age of 88. Busemann's Selected papers are now available in two volumes (908 and 842 pages), with introductory biographical material and commentaries on his work, and published by edited by Athanase Papadopoulos, Springer Verlag, 2018.


Books

* Herbert Busemann, Selected Works, (Athanase Papadopoulos, ed.) Volume I, , XXXII, 908 p., Springer International Publishing, 2018. * Herbert Busemann, Selected Works, (Athanase Papadopoulos, ed.) Volume II, , XXXV, 842 p., Springer International Publishing, 2018. * Introduction to algebraic manifolds, Princeton University Press, 1939. * with Paul J. Kelly: Projective geometry and projective metrics, Academic Press, 1953
Dover 2006
* Convex Surfaces, Interscience 1958
Dover, 2008
* Geometry of Geodesics, Academic Press 1955, Dover, 2005.

Princeton University Press, Oxford University Press, 1942. * with Bhalchandra Phadke: Spaces with distinguished geodesics, Dekker, 1987.
Recent synthetic differential geometry
Springer 1970.


See also

* Blaschke–Busemann measure *
Busemann function In geometric topology, Busemann functions are used to study the large-scale geometry of geodesics in Hadamard spaces and in particular Hadamard manifolds (simply connected complete Riemannian manifolds of nonpositive curvature). They are named af ...
* Busemann–Petty problem * Busemann G-space * Geodesic bicombing


Notes


References

* Reinhard Siegmund-Schultze, ''Mathematicians Fleeing from Nazi Germany: Individual Fates and Global Impact'', p. 107, Princeton University Press, 2009. * Richard J. Gardner, ''Geometric tomography'', p. 309, Cambridge University Press, 1994. * "Professor as SC plans study in New Zealand", ''
Los Angeles Times The ''Los Angeles Times'' is an American Newspaper#Daily, daily newspaper that began publishing in Los Angeles, California, in 1881. Based in the Greater Los Angeles city of El Segundo, California, El Segundo since 2018, it is the List of new ...
'', 6 January 1952, p. 22. * "Professors write Geometry Textbook", ''Los Angeles Times'' 10 August 1953, p. 1. * "Herbert Busemann, Oil Paintings", ''Los Angeles Times'', 18 January 1976, p. M59. * Lee Dembart, "An Unsung Geometer Keeps to His Own Plane", ''Los Angeles Times'', 14 July 1985, p. H3. * "Herbert Busemann; USC Emeritus Professor of Mathematics", ''Los Angeles Times'', 19 March 1994, p. 24. * Athanase Papadopoulos, "Herbert Busemann", ''Notices of the AMS'', vol. 65, No. 3, March 2018, p. 936-938. * Athanase Papadopoulos, "Geometry in the twentieth century: A return to Euclid---The work of Herbert Busemann", ''In: Handbook of the History and Philosophy of Mathematical Practice (ed. Bharath Sriraman)'', Springer, Cham, 2024, p. 465-470.


External links

*
Herbert Busemann's biography
(in
Spanish Spanish might refer to: * Items from or related to Spain: **Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many countries in the Americas **Spanish cuisine **Spanish history **Spanish culture ...
). {{DEFAULTSORT:Busemann, Herbert 20th-century American mathematicians 20th-century German mathematicians Differential geometers University of Southern California faculty Institute for Advanced Study visiting scholars Jewish emigrants from Nazi Germany to the United States Ludwig Maximilian University of Munich alumni University of Paris alumni 1905 births 1994 deaths German expatriates in France German expatriates in Italy