News archive


Algebra seminar - April 18, 1pm, lecture room M5 PDF Print

We will continue on Thursday, April 18, in M5 at 1pm by the talk

L. Positselski

Agreeable and topologically agreeable abelian categoreies

Abstract:
In the category of modules over an associative ring, there is a notion of a summable family of morphisms between a given pair of objects. The sum of such an (infinite) family of morphisms is well-defined.
In fact, there is a natural topology on the group of morphisms between two modules, and the summable families are simply the families of morphisms converging to zero in this topology. Generalizing to additive categories, one comes to the definition of an agreeable additive category, which was suggested in a 1973 unpublished manuscript of A.L.S. Corner, and to a more narrow class of topologically agreeable categories.
All Grothendieck abelian categories are agreeable, and all nearly finitely presentable Grothendieck categories are topologically agreeable; but nondiscrete spectral Grothendieck abelian categories are not topologically agreeable.

Last Updated on Monday, 15 April 2019 11:06
 
Innolec lectures - Rasul Shafikov - Polynomial and Rational Convexity in Complex Geometry PDF Print

Innolec lectures dates: 15.4. at 1:30pm, 16.4. at 4pm, 17.4. at 11:30am and 18.4. at 11:30am.

The lectures will be in the Seminar room on the 1st floor.

 

Rasul Shafikov (University of Western Ontario)

Polynomial and Rational Convexity in Complex Geometry

Last Updated on Monday, 15 April 2019 13:49
 
Differential equations seminar - April 15, 12pm, lecture room M5 PDF Print

Seminar of differential equations will continue on April 15, 2019 at 12pm in lecture room M5.

doc. Mgr. Petr Hasil, Ph.D. (Department of Mathematics and Statistics, MU)

Difference equations and their oscillation constants

Last Updated on Wednesday, 17 April 2019 08:44
 
Algebra seminar - April 11, 1pm, lecture room M5 PDF Print

We will continue on Thursday, April 11, in M5 at 1pm by the talk

Simon Henry

Model structure from small objects and left determined model structures

Abstract:
I'll present a way to characterize combinatorial weak model structures and left semi-model structures on a presentable category purely in terms of the cofibrations and trivial cofibrations between lambda-presentable objects (for some lambda).
As an application I'll present a generalization of Cisinski's theory of localizer to any locally presentable category instead of a topos. In particular it (partialy) answers the question posed by Rosicky and Tholen on the existence of left determined model structures.
If times permit (but probably not) I'll explain how this also allows to construct a "(pseudo) model category of model categories".

Last Updated on Monday, 08 April 2019 08:14
 
Differential equations seminar - April 8, 12pm, lecture room M5 PDF Print

Seminar of differential equations will continue on April 8, 2019 at 12pm in lecture room M5.

Maria Guadalupe Morales Macias, Ph.D. (Department of Mathematics and Statistics, MU)

Fractional-initial value problem

Last Updated on Thursday, 04 April 2019 07:52
 
«StartPrev12345678910NextEnd»

Page 1 of 18