Friends remembered Ms. Dufourmantelle as a profound philosopher and psychoanalyst whose work was widely admired.
“What to me characterized Anne was her gentleness and her strength,” said Hélène Fresnel, a journalist at Psychologies Magazine and a friend of Ms. Dufourmantelle’s. “She managed to tie the two together.”
Ms. Dufourmantelle had been a prominent voice of a new generation of female French intellectuals, Ms. Fresnel said, and her “gentleness and goodness” garnered widespread support from her peers.
“There are schools in the psychoanalytic field, and she transcended those schools,” Ms. Fresnel said.
Raphaël Enthoven, another French philosopher, posted a message on Twitter on Monday that paid tribute to Ms. Dufourmantelle’s work.
“Sadness and stupor to learn at the moment the death of the philosopher and psychoanalyst, who spoke so well of dreams,” Mr. Enthoven wrote.
France’s culture minister, Françoise Nyssen, also used Twitter to express her grief at the news of Ms. Dufourmantelle’s death.
“She helped us to live, to think about the world of today,” Ms. Nyssen wrote.
Ms. Dufourmantelle had two children from her first marriage and a daughter from her later relationship with the writer Frédéric Boyer. That daughter was on the beach with her on the day she died, according to a friend.
Ms. Dufourmantelle went to Brown University and was awarded a doctoral degree in philosophy from Paris-Sorbonne University. She wrote several books, including “Éloge du Risque” (“In Praise of Risk”), published in 2011, that embrace risk as a necessary part of the human experience.
“She was a singular human being,” said Guy Dana, a fellow psychoanalyst and friend. “She was both a philosopher, a psychoanalyst, a novelist. People like that are rare.”
Much of Ms. Dufourmantelle’s work delved into the nature of human fear and the freedom of risk taking.