Madhav V. Nori

Under the direction of Conjeerveram S. Seshadri Nori proved the existence of the fundamental group scheme ${\displaystyle \pi _{1}(X,x)}$ during his PhD work, using the theory of essentially finite vector bundles that he defined.^[2][3] The fundamental group scheme is also known as Nori fundamental group scheme, taking the name by his creator, and often also denoted as ${\displaystyle \pi ^{N}(X,x)}$, where ${\displaystyle N}$ stands for Nori. There is a special family of vector bundles called Nori-semistable vector bundles in Nori's honor as he had the first intuition for their existence and properties.^[4] His construction has been since then further generalized, for instance a proof of the existence of the fundamental group scheme for schemes defined over Dedekind schemes has been provided by Marco Antei, Michel Emsalem and Carlo Gasbarri.^[5][6]

• Nori motive (see https://ncatlab.org/nlab/show/Nori+motive)