Prof. Nitin Nitsure will deliver his next talk on Thursday, 20th Oct at 5:00 pm in Ramanujan Hall. Meanwhile he has shared the following link to the recent notes by Jarod Alper on 'Moduli and Stacks', which has a vast overlap with what Prof. Nitsure plans to cover. Jarod Alper is one of the leading experts in this area. https://sites.math.washington.edu/~jarod/moduli.pdf