Madeleine Jotz Lean

Lecturer – School of Mathematics and Statistics

Dr Madeleine Jotz-Lean has always had a passion for mathematics and research, which was nurtured from an early age by her teachers and supervisors. She began her publication record early, with 10 articles to her name by the end of her PhD. After moving from the US to Sheffield into a lectureship, she became more involved and interested in teaching, as well as equality and diversity, particularly tackling unconscious bias and stereotypes. She has also been involved in public outreach, using knitting and crochet to explain complex mathematical concepts to a wider audience.

Madeleine is now a Junior Professor at the University of Göttingen (Mathematisches Institut). Click here to see her full staff profile including research interests, teaching commitments and publication list.

Ask for advice, follow it, but also trust yourself and know what you want.

Career Timeline

2003–2006

Student representative in diverse committees (faculty board, hiring committee) at the University of Freiburg

2007

German Diplom in Mathematics (and Physics as a minor subject), Albert-Ludwig Universität

2008–2011

Personal tutor to several university, senior school and prep school students, over several years

2008

Invited talk “Singuläre Dirac Reduktion” in the Seminar Wechselwirkungen, Institute of Physics, University of Freiburg

2008

First author paper

Closedness of the Tangent Spaces to the Orbits of Proper Actions (with Karl-Hermann Neeb) “Journal of Lie Theory”, Volume 18 (2008), Number 3, 517-521.

2009

First author paper

Poisson reduction by distributions (with Tudor Ratiu) “Letters in Mathematical Physics” (2009), Volume 87, Numbers 1–2, 139-147.

2009

First author paper

Hedlund Metrics and the Stable Norm “Differential Geometry and its Applications”, Volume 27 (2009), Issue 4, 543-550

2010

Contributed talk “Infinitesimal data of a Dirac Lie groupoid, and a classification of its Dirac homogeneous spaces”, 5th Young Researchers Workshop on Geometry, Mechanics and Control, Tenerife.

2010–present

Member of the Geometric Mechanics and Control network

2011

PhD in Mathematics, EPF Lausanne

2011

Invited talk “A generalization of Drinfeld’s classification of Poisson homogeneous spaces of Poisson Lie groups”, GAP Seminar, Math Department, Penn State University.

2011

Visiting researcher of the Poisson geometry group at Penn State University, USA

2011–2012

Dorothea-Schlözer postdoctoral fellow at the University of Göttingen

2011–2012

Assistant (Göttingen) for the course Linear algebra and analytical geometry

2011

Invited talk “The leaf space of a multiplicative foliation”, Workshop on symplectic geometry, Université du Luxembourg.

2011

Visiting researcher of Professor Cristian Ortiz at Universidade Federal do Parana, Curitiba, Brazil

2011

Invited talk “Foliated groupoids and their infinitesimal data”, Kolloquium des Graduiertenkollegs, University of Göttingen

2011

First author paper

Singular reduction of Dirac structures (with Tudor Ratiu and Jedrzej Sniatycki), “Transactions of the AMS” (2011), Volume 363, 2967-3013.

2011

First author paper

Induced Dirac structure on isotropy type manifolds (with Tudor Ratiu), “Transformation Groups” (2011), Volume 16, Number 1, 175-191.

2011

First author paper

Dirac Lie groups, Dirac homogeneous spaces and the Theorem of Drinfeld, “Indiana University Mathematics Journal” (2011), 60, Number 1, 319-366.

2011

First author paper

Invariant generators for generalized distributions (with Tudor Ratiu), “Differential Geometry and its Applications” (2011), Volume 29, 826-837.

2011

First author paper

Invariant frames for vector bundles and applications (with Tudor Ratiu and Marco Zambon), “Geometriae Dedicata” (2012), 158, 23-34.

2012

Visiting researcher of the Poisson geometry group at the University of Utrecht, The Netherlands

2012

Invited talk “IM-foliations and double subalgebroids of the tangent double algebroid”, Quarterly Seminar on Geometry and Topology, University of Utrecht.

2012

Visiting researcher of the Poisson geometry group at Penn State University, USA

2012

Visiting researcher of the Poisson geometry group at the University of Toronto, Canada

2012

Invited talk “Dirac structures, Lie algebroids and Dorfman connections”, Kolloquium über reine, Mathematik, Hamburg

2012

Plenary talk “Dorfman connections and the infinitesimal data of Dirac groupoids”, Poisson 2012, Utrecht

2012

First author paper

Dirac structures, nonholonomic systems and reduction (with Tudor Ratiu), “Reports on Mathematical Physics”(2012), Volume 69, Number 1, 5-56.

2012–2014

Postdoctoral fellow at the University of California in Berkeley, (Prof. Alan Weinstein) (Swiss NSF grant for prospective researchers)

2013

First author paper

Dirac Optimal reduction, (with Tudor Ratiu), “International Mathematics Research Notices” (2013), Number 1, 84-155.

2013

Four months of maternity leave, conference break for around two years.

2013

Vice-Chancellor’s fellowship at the University of Sheffield (3 years)

2014

Association for Project Management’s Introductory Certificate (The APM Project Fundamentals Qualification)

2014

Member of SoMaS’s good practice group and Athena Swan champion

2014

Contributed talk “Dorfman connections and Courant algebroids”, 30th International Colloquium on Group Theoretical Methods in Physics, Ghent.

2014

Member of the European Mathematical Society and London Mathematical Society

2015

Second author paper

VB-algebroid morphisms and representations up to homotopy, (with Thiago Drummond and Cristian Ortiz), “Differential Geometry and its Applications” (2015), Volume 40, 332-357.

2015

Supervision of first PhD student

2015

Plenary talk “On the correspondence of Lie 2-algebroids and VB-Courant algebroids” at the XXXIV International Fall Workshop on Geometry and Physics, Zaragoza

2016

Local organiser for the 14th edition of the “Geometry and Physics, Séminaire itinérant”, University of Sheffield

2016

Plenary talk at the 25th anniversary conference of the Séminaire Sophus Lie, Bedlewo

2016–2018

Vertretungsprofessur in Göttingen