# Dr Jan Grabowski

Lecturer in Algebra and Geometry## Research Overview

My research is in the area of quantum algebra. Here "algebra" refers to the major branch of mathematics that studies the structure of mathematical objects and their symmetries. The adjective "quantum" highlights a relationship with the quantum theory of physics. In the mathematics of that theory, many of the variables do not commute - that is, *a* times *b* need not equal *b *times *a*. Many of the structures in quantum algebra have a multiplication that is not commutative. The ones I study are often not far from being commutative, though. One can often *deform* a commutative product of two elements *a* and *b* by putting in an extra parameter, *q* say, and changing the product so that now *ab=qba*. Then *ba=(1/q)ab* and if *q* does not equal 1, the product is not commutative. We can think of being allowed to vary *q* and talk of *q=1* as the "classical limit", just as classical physics can be recovered from quantum physics. The study of these deformations of well-understood classical algebraic and geometric objects is what makes up the field of quantum algebra.

More specifically, I work with Lie algebras, quantized enveloping algebras, quantized coordinate rings, partial flag varieties and quantum cluster algebras.

Selected Publications Show all 13 publications

Graded Frobenius cluster categories

Grabowski, J.E., Pressland, M. 3/11/2017 In: Documenta Mathematica. p. 1-23. 23 p.

Journal article

Graded quantum cluster algebras of infinite rank as colimits

Grabowski, J.E., Gratz, S. 19/11/2017 In: Journal of Pure and Applied Algebra. 18 p.

Journal article

Graded cluster algebras

Grabowski, J. 12/2015 In: Journal of Algebraic Combinatorics. 42, 4, p. 1111-1134. 24 p.

Journal article

Graded quantum cluster algebras and an application to quantum Grassmannians

Grabowski, J., Launois, S. 23/05/2014 In: Proceedings of the London Mathematical Society. 109, 3, p. 697-732. 36 p.

Journal article

Cluster algebras of infinite rank

Grabowski, J., Gratz, S., Groechenig, M. 2014 In: Journal of the London Mathematical Society. 89, 2, p. 337-363. 27 p.

Journal article

A quantum analogue of the dihedral action on Grassmannians

Allman, J.M., Grabowski, J. 06/2012 In: Journal of Algebra. 359, 1, p. 49-68. 20 p.

Journal article

Quantum cluster algebra structures on quantum Grassmannians and their quantum Schubert cells: the finite-type cases

Grabowski, J., Launois, S. 2011 In: International Mathematics Research Notices. 2011, 10, p. 2230-2262. 33 p.

Journal article

Examples of quantum cluster algebras associated to partial flag varieties

Grabowski, J. 2011 In: Journal of Pure and Applied Algebra. 215, 7, p. 1582-1595. 14 p.

Journal article

Braided enveloping algebras associated to quantum parabolic subalgebras

Grabowski, J. 14/10/2011 In: Communications in Algebra. 39, 10, p. 3491-3514. 24 p.

Journal article

Braided Lie bialgebras associated to Kac-Moody algebras

Grabowski, J. 2008 In: Journal of Lie Theory. 18, 1, p. 125-140. 16 p.

Journal article

Inductive constructions for Lie bialgebras and Hopf algebras

Grabowski, J. 2006 University of London.

Doctoral Thesis

On Lie induction and the exceptional series

Grabowski, J. 2005 In: Journal of Algebra and Its Applications. 4, 6, p. 707-737. 30 p.

Journal article

A triple construction for Lie bialgebras

Grabowski, J. 2005 In: Pacific Journal of Mathematics. 221, 2, p. 281-301. 22 p.

Journal article

Reconstructing Broken Symmetry

28/11/2014 → …

Research

Algebra seminar

Invited talk

Algebra seminar

Invited talk

London Algebra Colloquium

Invited talk

London Mathematical Society Lecture Note Series

Publication peer-review

Journal of Algebra

Publication peer-review

Advances in Applied Mathematics

Publication peer-review

Visit of Sian Fryer, University of Leeds

Hosting an academic visitor

Algebra-Geometry seminar

Invited talk

Algebras and Representation Theory

Publication peer-review

Visit of Matthew Pressland, University of Bath

Hosting an academic visitor

Invited talk at Special Session on "Combinatorics and Geometry of Quantum Algebras".

Invited talk

Visit of Sian Fryer, University of Leeds

Hosting an academic visitor

Invited talk at LMS Workshop on Cluster Algebras and Preprojective Algebras, Cardiff University

Invited talk

4 lectures at instructional course "Kent Algebra Days PGR"

Invited talk

Oberseminar zur Algebra und Algebraischen Kombinatorik

Invited talk

Pure Mathematics Colloquium

Invited talk

London Algebra Colloquium

Invited talk

Invited talk at conference "Cluster algebras and combinatorics", University of Münster

Invited talk

Glasgow Mathematical Journal

Editorial activity

Algebra-Geometry seminar, Newcastle University

Invited talk

Visit of Dr Stephane Launois, University of Kent

Hosting an academic visitor

Pure Mathematics seminar, University of Leicester

Invited talk

Member of EPSRC Peer Review College

Membership of peer review panel or committee

Journal of the London Mathematical Society

Publication peer-review

STEM Ambassador

Schools engagement

Review of EPSRC First Grant proposal

Membership of peer review panel or committee

Journal of Algebra

Publication peer-review

Review of NWO research proposal

Membership of peer review panel or committee

Review of EPSRC First Grant proposal

Membership of peer review panel or committee

Future directions for quantum groups

Participation in conference

XV International Conference on Representations of Algebras (ICRA XV)

Participation in conference

Algebras and Representation Theory

Publication peer-review

Algebra seminar, University of Glasgow

Participation in workshop, seminar, course

Pure Mathematics seminar, Lancaster University

Participation in workshop, seminar, course

Visit of Sira Gratz, Leibniz Universität Hannover, Germany

Hosting an academic visitor

29th meeting of ARTIN (Algebra and Representation Theory in the North)

Participation in workshop, seminar, course

Kent Algebra Days 2011

Participation in conference