Leopold Vietoris
Leopold Vietoris( 4 June 1891 – 9 April 2002) was an Austrian mathematician and a World War I veteran.
He was born in Radkersburg and died in Innsbruck.
He was known for his contributions to topology — notably the Mayer – Vietoris sequence—and other fields of mathematics, his interest in mathematical history and for being a keen alpinist.
David Ji
David Longfen Ji is an American businessman who co-founded Apex Digital, an electronics manufacturer.
In 2004, he was arrested in China following a dispute with Sichuan Changhong Electric, a supplier owned by the city of Mianyang and the province of Sichuan.
Changhong accused him of defrauding them through bad checks.
Ji was taken, according to an account by his lawyer, to the senior management and told, "I decide whether you live or die."
He has been held in China without charges.
Ji's case highlighted an "implicit racism" in dealings with American businessmen.
As a U.S. citizen he was not granted the same treatment by authorities as non-ethnically Chinese businessmen sharing the same nationality.
Walther Mayer
Walther Mayer (11 March 1887 – 10 September 1948) was an Austrian mathematician, born in Graz, Austria-Hungary.
With Leopold Vietoris he is the namesake of the Mayer–Vietoris sequence in topology.
He served as an assistant to Albert Einstein, and was nicknamed "Einstein's calculator".
Rob Evans (writer)
Rob Evans( also known as Robert Evans and Robert Alan Evans) born 14 March 1978 is a playwright.
Combinatorial topology
In mathematics, combinatorial topology was an older name for algebraic topology, dating from the time when topological invariants of spaces( for example the Betti numbers) were regarded as derived from combinatorial decompositions of spaces, such as decomposition into simplicial complexes.
After the proof of the simplicial approximation theorem this approach provided rigour.
The change of name reflected the move to organise topological classes such as cycles- modulo- boundaries explicitly into abelian groups.
This point of view is often attributed to Emmy Noether, and so the change of title may reflect her influence.
The transition is also attributed to the work of Heinz Hopf, who was influenced by Noether, and to Leopold Vietoris and Walther Mayer, who independently defined homology.
A fairly precise date can be supplied in the internal notes of the Bourbaki group.
While topology was still" combinatorial" in 1942, it had become" algebraic" by 1944.
Azriel Rosenfeld( 1973) proposed digital topology for a type of image processing that can be considered as a new development of combinatorial topology.
The digital forms of the Euler characteristic theorem and the Gauss – Bonnet theorem were obtained by Li Chen and Yongwu Rong.
A 2 D grid cell topology already appeared in the Alexandrov – Hopf book Topologie I( 1935).
Eugene Lukacs
Eugene Lukacs( Hungarian:" Lukács Jenő", 14 August 1906 – 21 December 1987) was an American statistician notable for his work in characterization of distributions, stability theory, and being the author of" Characteristic Functions", a classic textbook in the field.
Born to a Jewish family in born in Szombathely, from six weeks after birth Lukacs lived in Vienna, Austria.
There he received primary and secondary education and studied mathematics at University of Vienna.
His professors included Hans Hahn, Eduard Helly, Walter Meyer, Leopold Vietoris and Wilhelm Wirtinger.
In 1930 he earned his doctorate in geometry under the supervision of Walter Meyer, and a degree in actuarial science in 1931.
Eugene met his future wife Elizabeth Weisz( Lisl) in 1927 at the University of Vienna, and they married in 1935.
He taught secondary mathematics for two years and later accepted a position with an insurance company, where Eduard Helly and Z. W. Birnbaum were colleagues.
After Germany annexed Austria in 1938, he decided to emigrate to the United States, arriving in 1939.
In 1953 Eugene joined the Office of Naval Research( ONR) USA, and became the director of Statistics.
While at ONR he also taught at American University in Washington, D.C. Lukacs joined the Catholic University of America, Washington, D.C. in 1955.
There he organized the Statistical Laboratory in 1959 and became its first and only director.
Researchers at the Statistical Laboratory included Edward Batschlet, Tatsuo Kawata, Radha Laha, M. Masuyama and Vijay Rohatgi, and many distinguished visitors.
On his retirement from Catholic University in 1972, he moved with his colleagues Laha and Rohatgi to Bowling Green State University in Bowling Green, Ohio, where he remained until 1976.
His primary interest was in the theory of characteristic functions.
Prior to publication of his 1960 monograph," Characteristic Functions", the English language textbooks on the subject were translations of works by Cramer, Gnedenko and Kolmogorov, and Loève.
Lukacs' monograph was the first to present a unified and detailed treatment of the subject, and has remained a classical reference on the subject.
The revised and expanded second edition of" Characteristic Functions" appeared in 1970, followed by" Developments in Characteristics Function Theory" in 1983.
" Characteristic Functions" has been translated into several languages and continues to be an essential resource on the subject.
Lukacs was an elected Fellow of the Institute of Mathematical Statistics since 1957, and a Fellow of the American Statistical Association since 1969.
In 1973 he was elected to the Austrian Academy of Sciences.
Dodge (cyclecar)
The Dodge was a cyclecar manufactured in Detroit, Michigan, by the A.M. Dodge Company from 1914 to 1915.
The cyclecar had a four- cylinder 25 hp engine that was water- cooled, and had a frictionless transmission.
The vehicle was designed by George Wahl of Wahl Motor Company.
The company was later sued by the Dodge brothers in 1915, who claimed that their name had been infringed.
Vietoris–Begle mapping theorem
The Vietoris – Begle mapping theorem is a result in the mathematical field of algebraic topology.
It is named for Leopold Vietoris and Edward G. Begle.
The statement of the theorem, below, is as formulated by Stephen Smale.
Walther Mayer
Walther Mayer (11 March 1887 – 10 September 1948) was an Austrian mathematician, born in Graz, Austria-Hungary.
With Leopold Vietoris he is the namesake of the Mayer–Vietoris sequence in topology.
He served as an assistant to Albert Einstein, and was nicknamed "Einstein's calculator".
Robert Wahl
Robert Allen" Al" Wahl( born 20 July 1927), nicknamed" Brick" Wahl, is a former football player who was a two- time All- American for the University of Michigan Wolverines in 1949 and 1950.
Wahl is also a former U.S. Army heavyweight boxing champion( European theater) who went on to become the president of a Fortune 500 company, Valmont Industries.

Question: Are Leopold Vietoris and Robert Wahl of the same nationality?
Answer: no