Séminaires : Phd Seminar - Séminaire des doctorant.e.s

Le séminaire des doctorant.e.s est l'occasion pour les doctorant.e.s de présenter des résultats et des problématiques dignes d'intérêt devant un public de non-spécialistes. L'ambiance y est informelle ; poser des questions naïves est encouragé, et les questions moins naïves sont bienvenues dans la mesure où elles n'entravent pas le bon déroulement de l'exposé.

Chaque jeudi à 18h, en alternance entre Jussieu et Sophie Germain.

The PhD seminar is an opportnuity for PhD students to present results and topics worthy of interest in front of a non-specialist audience. The mood is informal ; asking naive questions is highly encouraged and less naive questions are also welcomed, as long as they don't intefere with the smoothness of the talk.

Every Thursday at 6pm, alternating between Jussieu and Sophie Germain.

Quiver representation theory is a fundamental tool in modern representation theory of associative algebras. A cornerstone of this field is Gabriel's theorem, which characterizes quivers with finitely many indecomposable representations as precisely those arising from Dynkin diagrams of type ADE. This result provided an early glimpse into a profound connection between quiver representations and Lie theory, one that has since led to remarkable developments, including Lusztig's theory of canonical bases in quantum groups and Nakajima's quiver varieties in geometric representation theory. In this talk, we will give an accessible introduction to this interplay, starting with the theorems of Gabriel and Kac and culminating in Ringel's realization of the positive half of quantum groups through Ringel-Hall algebras.