Robert Tijdeman (born 30 July 1943 in

Oostzaan Oostzaan () is a municipality and a town in the Zaanstreek, Netherlands, in the province of North Holland. The municipality had a population of in . Oostzaan has a total area of of which is water. Oostzaan—together with Westzaan and Assen ...

North Holland North Holland ( nl, Noord-Holland, ) is a province of the Netherlands in the northwestern part of the country. It is located on the North Sea, north of South Holland and Utrecht, and west of Friesland and Flevoland. In November 2019, it had a ...

) is a Dutch mathematician. Specializing in

number theory Number theory (or arithmetic or higher arithmetic in older usage) is a branch of pure mathematics devoted primarily to the study of the integers and arithmetic function, integer-valued functions. German mathematician Carl Friedrich Gauss (1777� ...

, he is best known for his

Tijdeman's theorem In number theory, Tijdeman's theorem states that there are at most a finite number of consecutive powers. Stated another way, the set of solutions in integers ''x'', ''y'', ''n'', ''m'' of the exponential diophantine equation :y^m = x^n + 1, for ...

. He is a professor of mathematics at the

Leiden University Leiden University (abbreviated as ''LEI''; nl, Universiteit Leiden) is a Public university, public research university in Leiden, Netherlands. The university was founded as a Protestant university in 1575 by William the Silent, William, Prince o ...

since 1975, and was chairman of the department of mathematics and computer science at Leiden from 1991 to 1993. He was also president of the Dutch Mathematical Society from 1984 to 1986.Curriculum vitae
from Tijdeman's web site, retrieved 2009-08-26. Tijdeman received his PhD in 1969 from the

University of Amsterdam The University of Amsterdam (abbreviated as UvA, nl, Universiteit van Amsterdam) is a public research university located in Amsterdam, Netherlands. The UvA is one of two large, publicly funded research universities in the city, the other being ...

, and received an honorary doctorate from Kossuth Lajos University in 1999. In 1987 he was elected to the

Royal Netherlands Academy of Arts and Sciences The Royal Netherlands Academy of Arts and Sciences ( nl, Koninklijke Nederlandse Akademie van Wetenschappen, abbreviated: KNAW) is an organization dedicated to the advancement of science and literature in the Netherlands. The academy is housed ...

References

External links

Tijdeman's web site at Leiden
1943 births Living people People from Oostzaan 20th-century Dutch mathematicians 21st-century Dutch mathematicians Number theorists Members of the Royal Netherlands Academy of Arts and Sciences Academic staff of Leiden University University of Amsterdam alumni {{Europe-mathematician-stub