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BogomolovMultiplier SIGNED

Bogomolov Multiplier

Total Cost €


EC-Contrib. €






Project "BogomolovMultiplier" data sheet

The following table provides information about the project.


Organization address
city: LEIOA
postcode: 48940

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Spain [ES]
 Project website
 Total cost 158˙121 €
 EC max contribution 158˙121 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2016
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2017
 Duration (year-month-day) from 2017-10-01   to  2019-09-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

This project is dedicated to studying a geometric invariant called the Bogomolov multiplier. The main objectives of the proposed project are threefold.

First of all, we wish to understand how the structure of the Bogomolov multiplier depends on the structure of the underlying group. To this end, we set to inspect the behavior of the Bogomolov multiplier with respect to another group theoretical invariant, the coclass. In turn, this will require thoroughly developing a theory of Bogomolov multipliers associated to profinite groups. A particular instance of these are $p$-adic Lie groups. We aim to enrich our understanding of their Bogomolov multipliers by translating the study to their associated Lie algebras.

Secondly, we are interested in applications of our knowledge about the Bogomolov multiplier. Our focus here will be to strengthen the visible connections between the Bogomolov multiplier and automorphism groups. Kang and Kunyavskii recently noted a link between the Bogomolov multiplier and the Tate-Shafarevich set. This relation is expressible in terms of outer automorphisms of a given group. We aim to prove the implication that groups possessing special outer automorphisms must have nontrivial Bogomolov multipliers. Further evidence of this interplay between automorphisms and Bogomolov multipliers can be seen in the category of representations of a given group as shown by Davydov, and we intend to look into these more abstract aspects as well.

Lastly, we propose to explore some extensions of the Bogomolov multiplier to higher dimensions. Our intentions here are to find algebraic descriptions of higher dimensional unramified cohomology groups and of Ekedahl invariants akin to the combinatorial description of the Bogomolov multiplier. Peyre has shown that this can be achieved for unramified cohomology groups of degree three for a special class of groups. We see a possible extension of these results in terms of higher dimensional combinatorial objects.


year authors and title journal last update
List of publications.
2019 Jezernik, Urban; Sánchez, Jonatan
Irrationality of generic quotient varieties via Bogomolov multipliers
published pages: , ISSN: , DOI:
ArXiv (preprint, submitted to peer re 2020-04-14
2019 Fernandez-Alcober, Gustavo Adolfo; Jezernik, Urban
Bogomolov multipliers of p-groups of maximal class
published pages: , ISSN: 0033-5606, DOI:
The Quarterly Journal of Mathematics (accepted for publication, to a 2020-04-14
2018 Jezernik, Urban
Verjetnost komutiranja
published pages: 121–137, ISSN: 0473-7466, DOI:
Obzornik za matematiko in fiziko 65 2020-04-14
2019 Delizia, Costantino; Jezernik, Urban; Moravec, Primoz; Nicotera, Chiara
Gaps in probabilities of satisfying some commutator-like identities
published pages: , ISSN: 0021-2172, DOI:
Israel Journal of Mathematics (accepted for publication, to a 2020-04-14

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