In « Récoltes et Semailles » Grothendieck has a reflexion about the article of Langlands  : «  Automorphic representations, Shimura varieties, and motives » where he sees the influence of his ideas on the «  motivic Galois group » that Langlands has may be found in the thesis of a student of Grothendieck  : Neantro Saavedra Rivano or from Deligne. Grothendieck sees also his influence in the references made by Langlands on the so called «  Catégories Tannakiennes » which were parts (not under this name) of his reflexions on motives.

Grothendieck writes that «  la théorie à la Langlands des formes automorphes » is intimately linked to motives. He adds that he is regrettably ignorant of the theory of automorphic functions and that he doesn't know if he will have the occasion to change this fact.

In « Récoltes et Semailles » Grothendieck has a reflexion about the article of Langlands  : «  Automorphic representations, Shimura varieties, and motives » where he sees the influence of his ideas on the «  motivic Galois group » that Langlands has may be found in the thesis of a student of Grothendieck  : Neantro Saavedra Rivano or from Deligne. Grothendieck sees also his influence in the references made by Langlands on the so called «  Catégories Tannakiennes » which were parts (not under this name) of his reflexions on motives.

Grothendieck writes that «  la théorie à la Langlands des formes automorphes » is intimately linked to motives. He adds that he is regrettably ignorant of the theory of automorphic functions and that he doesn't know if he will have the occasion to change this fact.