I have recently been interested in the history of French Mathematics especially in Grothendieck and his school. I have also been fascinated with Grothendieck's personality.
It is known that during Grothendieck's IHES years is his dedication to mathematics was legendary as attested by many of his colleagues. However, I have also heard that during times he would be so concentrated on mathematical research that he would forget/neglect to sleep and eat.
Is that true?
Could you provide references.
P.S. I am interested in this questions since I am studying psychology and examining the personalities of influential mathematicians. I have to write on the subject. Your help is greatly appreciated.