Tue, March 19, 2024
Public Access


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Category: All

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11:00am [11:30am] Nitin Nitsure, Bhaskaracharya Pratishthana, Pune
Description:

 

Algebraic Geometry Seminar

Date

Tuesday, 19 March, 11.30 am

Venue

Room 215

Host

Sudarshan Gurjar

speaker

Nitin Nitsure

Affiliation

Bhaskaracharya Pratishthana

Title

Effective Galois descent for Schemes and Algebraic Space.

Abstract

We will translate faithfully flat descent and effective descent into Galois theoretic terms, and give examples. Then we will consider the problem of effective Galois descent for the fibered categories of schemes and algebraic spaces. While effective Galois (and etale) descent holds for algebraic spaces, we will give an elementary example showing it does not hold for the subcategory of algebraic spaces formed by schemes. This is one of the advantages of generalizing from schemes to algebraic spaces.

 


12:00pm  
1:00pm  
2:00pm  
3:00pm  
4:00pm [4:00pm] Akash Yadav, IIT Bombay
Description:

Algebraic Groups Seminar

Tuesday, March 19, 2024, 4 pm

====================

 

Venue: Ramanujan Hall

Host: Shripad M. Garge


Speaker: Akash Yadav

Affiliation: IIT Bombay, Mumbai

Title: Parabolic subgroups I

 

Abstract: We introduce the notion of parabolic subgroups in linear algebraic groups.


[4:00pm] R. V. Gurjar, IIT Bombay
Description:

 

Commutative Algebra  and Algebraic Geometry Seminar

Date

Tuesday, 19 March 2024, 4-5 pm

Venue

Room 215

Host

Tony J. Puthenpurakal

speaker

R. V. Gurjar

Affiliation

IIT Bombay

Title

Some more results about Brieskorn-Pham singularities

Abstract

We will discuss the following results. (1) Classification of 3-dimensional factorial B-P singularities by U.Storch. (2) Classification of affine B-P 3-folds which admit a non-trivial action of the additive group G_a (equivalently, a non-zero locally nilpotent derivation on their coordinate ring) by M. Chitayat. (3) Classification of affine B-P 3-folds which are rational (i.e. their function field is a purely transcendental extension of the ground field) by M Chitayat.

 


5:00pm  
6:00pm