• The Inria's Research Teams produce an annual Activity Report presenting their activities and their results of the year. These reports include the team members, the scientific program, the software developed by the team and the new results of the year. The report also describes the grants, contracts and the activities of dissemination and teaching. Finally, the report gives the list of publications of the year.

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## Section: New Results

### Curve analysis for the stability of time-delay systems

This work aims to design a new symbolic-numerical Puiseux-free approach for the study of the stability of differential time-delay systems. The idea behind is to replace the costly computations of Puiseux developpements around the critical pairs of the characteristic function by the numerical analysis of the branches of a well chosen 3D curve. The preliminary results show that this approach is easier to implement and turns out to be more efficient in practice. This ongoing work will be the subject of a future publication.