Wikipedia's first sentence called it “israeli mathematician”. Today it says “german-born american-israeli mathematician and professor emeritus at the hebrew university of jerusalem”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-03.
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The opening as it read in 2010
Hillel Furstenberg in 1992 (photo by George Bergman) Hillel (Harry) Furstenberg ( ) (September 29, 1935, Berlin) is an Israeli mathematician , a member of the Israel Academy of Sciences and Humanities and U.S.1 National Academy of Sciences and a laureate of the Wolf Prize in Mathematics . He is known for his application of probability theory and ergodic theory methods to other areas of mathematics, including number theory and Lie groups . He gained attention at an early stage in his career for producing an innovative topological proof of the infinitude of prime numbers . He proved unique ergodicity of horocycle flows on a compact hyperbolic Riemann surfaces in the early 1970s. In 1977, he gave an ergodic theory reformulation, and subsequently proof, of Szemerédi's theorem . The Furstenberg boundary and Furstenberg compactification of a locally symmetric space are named after him.2
This is Wikipedia's own text, saved in our repository. Their copy of it is revision 366302472.
The opening as it stood in 2015 4 passages from the previous snapshot no longer appear
Hillel (Harry) Furstenberg ( ) (born September 29, 1935) is an American-Israeli mathematician , a member of the Israel Academy of Sciences and Humanities and U.S. National Academy of Sciences and a laureate of the Wolf Prize in Mathematics . He is known for his application of probability theory and ergodic theory methods to other areas of mathematics, including number theory and Lie groups .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 661234141.
The opening as it stood in 2020
American-Israeli mathematician Hillel (Harry) Furstenberg ( ) (born September 29, 1935 in Berlin ) is an American-Israeli mathematician and professor emeritus at the Hebrew University of Jerusalem .National Academy of Sciences and a laureate of the Abel Prize and the Wolf Prize in Mathematics . He is known for his application of probability theory and ergodic theory methods to other areas of mathematics, including number theory and Lie groups .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 958224021.
The opening as it stood on October 6, 2023
American-Israeli mathematician Hillel "Harry" Furstenberg ( ) (born September 29, 1935) is a German-born American-Israeli mathematician and professor emeritus at the Hebrew University of Jerusalem . National Academy of Sciences and a laureate of the Abel Prize and the Wolf Prize in Mathematics . He is known for his application of probability theory and ergodic theory methods to other areas of mathematics, including number theory and Lie groups .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1177153625.
The opening as it stood in 2025
American-Israeli mathematician Hillel "Harry" Furstenberg ( Hebrew : הלל (הארי) פורסטנברג ; born September 29, 1935) is a German-born American-Israeli mathematician and professor emeritus at the Hebrew University of Jerusalem . National Academy of Sciences and a laureate of the Abel Prize and the Wolf Prize in Mathematics . He is known for his application of probability theory and ergodic theory methods to other areas of mathematics, including number theory and Lie groups .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1287677607. This is our newest snapshot; the live article may have moved again since.
Today
Wikipedia's first sentence called it “israeli mathematician”. Today it says “german-born american-israeli mathematician and professor emeritus at the hebrew university of jerusalem”. Read the current article and compare.
2010
2015
2020
Oct '23
2025
Counts in the opening at each snapshot. Green: the word gained ground. Red: it was cut. Grey: no change.
What Wikipedia says this is
Every article opens by defining its subject. This one was redefined since 2010, and today's defining sentence is their current revision.
Then
israeli mathematician
Now
german-born american-israeli mathematician and professor emeritus at the hebrew university of jerusalem
Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.
