Jean-Marc Fontaine (13 March 1944 – 29 January 2019) was a French mathematician.
He was one of the founders of p-adic Hodge theory.
He was a professor at Paris-Sud 11 University from 1988 to his death.
He was born in Boulogne-Billancourt, France.

In 1984 he received the Prix Carrière from the French Academy of Sciences.
Beginning in 2002 he was a member of the French Academy of Sciences.

Fontaine died on 29 January 2019 in Paris from thyroid cancer at the age of 74.
Jean-Marc Fontaine (13 March 1944 – 29 January 2019) was a French mathematician. He was one of the founders of p-adic Hodge theory. He was a professor at Paris-Sud 11 University from 1988 to his death. He was born in Boulogne-Billancourt, France.
In 1984 he received the Prix Carrière from the French Academy of Sciences. Beginning in 2002 he was a member of the French Academy of Sciences.
Fontaine died on 29 January 2019 in Paris from thyroid cancer at the age of 74.
Jean-Marc Fontaine