I want to learn about the Fundamental Group Scheme(First introduced by Madhav Nori). I am familiar with Basic Algebraic Geometry at the level of Eisenbud & Harris'"Geometry of Schemes" & to a lesser extent with Hartshorne's book. Can anyone suggest a good expository source for the above topic that would be accessible to me?
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$\begingroup$ Questions of the form "I want to learn about ..." are rather discouraged here. $\endgroup$– Stefan Kohl ♦Commented Mar 13, 2015 at 11:47
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2$\begingroup$ @Stefan Kohl: why? It seems to me the OP is asking a legitimate reference request (I added the appropriate tag), also specifying his background. He is not asking people to write an expository article for him, or similar stuff... $\endgroup$– QfwfqCommented Mar 13, 2015 at 13:57
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$\begingroup$ I agree that the question seems reasonable and doesn't deserve to be closed. However, my suggestion to Priyankur would be to learn a bit more algebraic geometry before jumping into this topic. At the very least, first learn a bit about the etale fundamental group from Murre's "Lectures on Grothendieck's fundamental group" TIFR. $\endgroup$– Donu ArapuraCommented Mar 14, 2015 at 18:52
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In my opinion
T. Szamuely, Galois groups and fundamental groups. Cambridge Studies in Advanced Mathematics, 117. Cambridge University Press,
is an excellent source.