Algebraic Stacks lecture series
Tuesday, 13 February, 11:30 AM
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Venue: Ramanujan Hall
Host: Sudarshan Gurjar
Speaker: Nitin Nitsure
Affiliation: Bhaskaracharya Pratishthana
Title: Separated and proper morphisms for algebraic stacks.
Abstract: We will begin by revisiting the valuative criteria for universal closedness and separateness for morphisms between schemes. This will be followed by interesting elementary examples that illustrate why these criteria do not directly apply to algebraic spaces and algebraic stacks. We will end with the modified criteria that apply to algebraic spaces and algebraic stacks.