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On this site, you will find an overview of the Institute's events, lecture series, workshops, topic seminars, cultural experiences, events and much more. The Institute of Mathematics invites all students, staff and anyone with interest to take part.

08.12.2025, 09:00 – Campus Golm, Building 9, Room 0.14
Forschungsseminar Wahrscheinlichkeitstheorie

Domino tilings of the Aztec diamond in random environment

Panagiotis Zografos

Abstract:
The Aztec diamond, under the uniform measure on domino tilings, is one of the classical gems
of integrable probability. Its special structure makes it exactly solvable, and over the years...

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11.12.2025, 16:15 Uhr – Raum 1.22, Haus 9
Forschungsseminar Differentialgeometrie

Hodge Dualities in the Perturbation Setup and Applications:Perturbed Zeta Determinant and Analytic Torsion

Ihsane Malass

We consider the perturbation of the exterior differential by a closed one-form \(a\), \(d_a := d + a \wedge \cdot\), on a manifold with boundary. This gives rise to the perturbed (or twisted) de Rham...

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12.12.2025, 12:00 – Campus Golm, Building 9, Room 1.22 and via Zoom
Arbeitsgruppenseminar Analysis

A Pre-tty Pre-amble to Pre-Lie Algebras from Combinatorial Species

Yannic Vargas (CUNEF University Madrid)

We present an introduction to pre-Lie algebras, an algebraic structure closely related to Lie algebras. From a combinatorial perspective, pre-Lie algebras are connected to the notion of insertion of...

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17.12.2025, 14:00 - 16:00 – Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

Formalising Mathematics: differential geometry and number theory in the Lean proof assistant

María Inés Frutos Fernández and Michael B. Rothgang (Uni Bonn)

14:00 Michael Rothgang (Uni Bonn): Formalising differential geometry in Lean.
15:00 Tea and Coffee Break
15:30 María Inés de Frutos Fernández (Uni Bonn): Number Theory in the Lean Theorem Prover.

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18.12.2025, 16:15 – Raum 1.22
Forschungsseminar Differentialgeometrie

On local boundary conditions for Dirac-type operators

Nadine Große (Freiburg)

We discuss smooth local boundary conditions for Dirac-type operators, giving existence and non-existence results for local self-adjoint boundary conditions and discuss concrete parametrizations of the...

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14.01.2026, 14:00 - 16:00 – Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium

TBA

Christian Mercat (Lyon), N.N.

TBA

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16.01.2026, 11:00 – Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

TBA

Daan Janssen (York, UK)

TBA

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22.01.2026, 16:15 Uhr – TBA
Forschungsseminar Differentialgeometrie

TBA (van den Dungen)

Koen van den Dungen

TBA

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23.01.2026, 11:00 – Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

TBA

Janina Bernardy (Bonn)

TBA

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29.01.2026, 16:15 – Building 9, Room 1.22 (Joint session with Analysis group)
Forschungsseminar Differentialgeometrie

Equivalence between local and global Hadamard States with Robin boundary conditions on half-Minkowski spacetime

Claudio Dappiaggi (Pavia)

We construct the fundamental solutions and Hadamard states for a Klein-Gordon field in half-Minkowski spacetime with Robin boundary conditions in arbitrary dimensions using a generalisation of the...

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