2019
Dec
30

# Combinatorics: Gal Kronenberg (Oxford)

10:00am to 12:00pm

## Location:

C-400, CS building

**Speaker:**Gal Kronenberg (Oxford)

**Title**: The chromatic index of random multigraphs

**Abstract:**

Edmond J. Safra Campus The Hebrew University of Jerusalem

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2019
Dec
30

10:00am to 12:00pm

C-400, CS building

2020
Apr
27

11:00am to 1:00pm

Zoom

2020
Jan
20

10:00am to 12:00pm

C-400, CS building

2020
Jan
06

10:00am to 12:00pm

C-400, CS building

2020
Mar
23

Repeats every week every Monday until Mon Jun 29 2020 except Mon Apr 06 2020.

11:00am to 1:00pm11:00am to 1:00pm

11:00am to 1:00pm

11:00am to 1:00pm

11:00am to 1:00pm

11:00am to 1:00pm

11:00am to 1:00pm

11:00am to 1:00pm

11:00am to 1:00pm

11:00am to 1:00pm

11:00am to 1:00pm

11:00am to 1:00pm

11:00am to 1:00pm

11:00am to 1:00pm

Manchester 110

2020
Jan
27

10:00am to 12:00pm

C-400, CS building

In this talk we study a natural generalization of the classical \eps-net problem (Haussler-Welzl 1987), which we call 'the \eps-t-net problem': Given a hypergraph on n vertices and parameters t and \eps , find a minimum-sized family S of t-element subsets of vertices such that each hyperedge of size at least \eps n contains a set in S. When t=1, this corresponds to the \eps-net problem.

2020
Jan
13

10:00am to 12:00pm

C-400, CS building

2019
Dec
23

10:00am to 12:00pm

C-400, CS building

2020
Jan
12

(All day)

Manchester House, Lecture Hall 2

2019
Dec
26

4:00pm to 5:15pm

Ross 70

Using the axiom of choice one can construct set of reals which are

pathological in some sense. Similar constructions can be produce such

"pathological" subsets of any non trivial Polish space (= a complete

separable metric space).

A "pathological set" can be a non measurable set , a set which does

not have the property of Baire (namely it is not a Borel set modulo a

rst category set).

A subset of the innite subsets of natural numbers,

can be considered to be "pathological" if it is a counter example to

pathological in some sense. Similar constructions can be produce such

"pathological" subsets of any non trivial Polish space (= a complete

separable metric space).

A "pathological set" can be a non measurable set , a set which does

not have the property of Baire (namely it is not a Borel set modulo a

rst category set).

A subset of the innite subsets of natural numbers,

can be considered to be "pathological" if it is a counter example to

2020
Jan
09

4:00pm to 5:15pm

Ross 70

Using the axiom of choice one can construct set of reals which are

pathological in some sense. Similar constructions can be produce such

"pathological" subsets of any non trivial Polish space (= a complete

separable metric space).

A "pathological set" can be a non measurable set , a set which does

not have the property of Baire (namely it is not a Borel set modulo a

rst category set).

A subset of the innite subsets of natural numbers,

can be considered to be "pathological" if it is a counter example to

pathological in some sense. Similar constructions can be produce such

"pathological" subsets of any non trivial Polish space (= a complete

separable metric space).

A "pathological set" can be a non measurable set , a set which does

not have the property of Baire (namely it is not a Borel set modulo a

rst category set).

A subset of the innite subsets of natural numbers,

can be considered to be "pathological" if it is a counter example to

2019
Dec
11

11:00am to 1:00pm

Ross building - Room 63

Semialgebraic groups over a real closed field can be seen as a generalization of the semialgebraic groups over the real field, and also as a particular case of the groups definable in an o-minimal structure.

2020
Jan
16

12:00pm to 1:00pm

Manchester Building, Room 209

January 16, 12:00-13:00, Seminar room 209, Manchester building.

__Abstract:__ I plan to show a proof of the statement "residually-finite-by-residually-finite extensions are weakly sofic". The proof is based on characterization of weakly sofic groups

by solvability of equations over groups. It looks different from other proofs of soficity and weak soficity. I plan to discuss relations of equations on and over groups with soficity in some details.

by solvability of equations over groups. It looks different from other proofs of soficity and weak soficity. I plan to discuss relations of equations on and over groups with soficity in some details.

2019
Dec
05

4:00pm to 5:30pm

Ross 70

Eran Nevo with continue his presentation of the Stanley-Reisner theory.

2019
Dec
03

1:00pm to 3:00pm

Shprintsak building - Room 29

A. Pillay showed that every definable group in the p-adics has a canonical topology and differential structure, and deduced that every definable field is either finite or a finite extension of Q_p.

In a joint work with J. de la Nuez Gonzalez we extend the analysis to interpretable fields, and show that they are either countable or finite extensions of Q_p.

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