# Dictionary Definition

apery n : the act of mimicking; imitative
behavior [syn: mimicry]

# Extensive Definition

Roger Apéry (November 14
1916 –
December
18 1994)
was a Greek-French mathematician most
remembered for Apéry's
theorem, that ζ(3) is an irrational
number where ζ denotes the Riemann
zeta function.

Apéry was born in Rouen in 1916 to a French mother and
Greek
father. After studies at the
École Normale Supérieure (interrupted by a year as prisoner of
war during WWII) he was appointed Lecturer at Rennes. In 1949 he
was appointed Professor at the University
of Caen where he remained until his retirement. He died after a
long illness in 1994.

In 1979, he stunned the
mathematical world with his unexpected proof of the irrationality
of the sum of the inverse of the cubes of integers ζ(3). An indication of
the difficulty is that the corresponding problem for other odd
powers remains unsolved. Nevertheless, many mathematicians have
since worked on the so-called Apéry sequences to seek alternative
proofs that might apply to other odd powers (F. Beukers, A. Van Den
Poorten, M. Prevost, K. Ball, T. Rivoal, W. Zudillin and
others).

Apéry was active in politics and for a few years
in the 60's was president of the Calvados Radical Party. He
abandoned politics after the reforms instituted by Edgar Faure
after the '68 revolt, when he realised that University life was
running against the tradition he had always upheld.

## External links

apery in German: Roger Apéry

apery in French: Roger Apéry

apery in Italian: Roger Apéry

apery in Japanese: ロジェ・アペリー

apery in Slovenian: Roger
Apéry