Karl Zsigmondy
Encyclopedia
Karl Zsigmondy was an Austrian
Austrians
Austrians are a nation and ethnic group, consisting of the population of the Republic of Austria and its historical predecessor states who share a common Austrian culture and Austrian descent....

 mathematician
Mathematician
A mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....

 of Hungarian ethnicity. He was a son of Adolf Zsigmondy
Adolf Zsigmondy
Adolf Zsigmondy, aka Adolph Zsigmondy was a dentist of Hungarian origin who lived in Vienna. It was he who conceived the idea of charting teeth on the Zsigmondy-cross...

 from Pozsony, Kingdom of Hungary
Kingdom of Hungary
The Kingdom of Hungary comprised present-day Hungary, Slovakia and Croatia , Transylvania , Carpatho Ruthenia , Vojvodina , Burgenland , and other smaller territories surrounding present-day Hungary's borders...

 and his mother was Irma von Szakmáry of Martonvásár
Martonvásár
Martonvásár is a town in Fejér county, Hungary....

, Kingdom of Hungary
Kingdom of Hungary
The Kingdom of Hungary comprised present-day Hungary, Slovakia and Croatia , Transylvania , Carpatho Ruthenia , Vojvodina , Burgenland , and other smaller territories surrounding present-day Hungary's borders...

.

He studied (1886–1890) and worked (1894–1925) at the University of Vienna
University of Vienna
The University of Vienna is a public university located in Vienna, Austria. It was founded by Duke Rudolph IV in 1365 and is the oldest university in the German-speaking world...

. After his phd, in 1890, he studied at the University of Berlin, University of Göttingen and at the Sorbonne
Sorbonne
The Sorbonne is an edifice of the Latin Quarter, in Paris, France, which has been the historical house of the former University of Paris...

 in Paris, but came back to Vienna in 1894. He discovered Zsigmondy's theorem in 1882.

He was the brother of the Nobel Laureate Chemist Richard Adolf Zsigmondy
Richard Adolf Zsigmondy
Richard Adolf Zsigmondy was an Austrian-Hungarian chemist and Nobel laureate for chemistry known for his research in colloids. The crater Zsigmondy on the Moon is named in his honour....

.
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