| Joseph Oesterlé | |
|---|---|
| Born | 1954 (age 57–58) Alsace |
| Nationality | France |
| Fields | Mathematics |
| Institutions | Pierre and Marie Curie University |
| Alma mater | Paris-Sud 11 University |
| Doctoral students | Alain Kraus Loïc Merel |
| Known for | abc conjecture |
Joseph Oesterlé (born 1954) is a French mathematician who, along with David Masser, formulated the abc conjecture in 1985. It is perhaps the most important unsolved problem in diophantine analysis.