Insmi - New call for long visits to international laboratories (IRLs)

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Researchers and academics who are members of a CNRS lab (Unités Mixtes de Recherche) under the CNRS Mathematics banner can apply to spend a medium- or long-term period abroad at one of the International Research Laboratories (IRL) affiliated to CNRS mathematics. The present call is for dates in 2025 or covering 2025-2026.

You will find the list of destination laboratories on this page:

In order to plan your period abroad as effectively as possible, it is essential to discuss your plans informally with the deputy scientific director in charge of international affairs at CNRS mathematics at a very early stage (before you submit your application). Contact:

You should also contact the director of the IRL as soon as you start preparing the project, and ask for his or her agreement. Take the same approach with your Head of department (DU).

NB: The 10 institutes at CNRS are responsible for a series of IRLs in their areas of expertise. You may request an assignment to an IRL that falls outside the remit of CNRS Mathematics, if this makes sense with the research plan you propose. In this case, please contact the institute affiliated to the IRL in order to receive the correct procedures.


Applications and files should be sent to our generic address ( with Cc to the director of the IRL, as well as to the director of your UMR.

Deadline for applications: 15 October 2024

Please include in your application:

  • An up-to-date curriculum vitae / resume
  • An up-to-date list of publications
  • A description of the research project you intend to develop at the IRL. Mention the intended dates.
  • A letter of invitation from the person wishing to work with you at the IRL
  • Agreement from the IRL Director (an email is sufficient)
  • Agreement from the UMR (an email is sufficient)

Once you have sent your application, the following calendar will be in place:

  • From late October to late January 2025: review and assessment of all files in consultation with IRL directors
  • April 2025 (or around that date): decision and communication to the applicants (the exact date will depend on when ‘délégations’ are officially published). See more explanations on this in the next paragraph.

Requesting a CNRS ‘délégation’ for a long period at an International Research Laboratory

CNRS staff interested in responding to this call must be tenured researchers. Academics can also respond but must obtain a ‘délégation’ (a specific position for lecturers and university professors to undertake research while having their teaching duties financially covered by CNRS). Note that obtaining a CRCT is not enough. The request for a delegation for the 2025-2026 campaign will have to be uploaded on the specific national online application according to your university calendar. You should indicate as Host laboratory the International Research laboratory you are interested in (they all have a number and an abbreviated name). This should be undertaken once you have discussed and obtained the green light from the IRL’s director.

Keep in mind

CNRS operates on a calendar year basis while the calendar for ‘delegations’ is based on the university calendar. In order to accommodate everyone, CNRS mathematics will consider both 2025 projects (calendar year, researchers only) and 2025-2026 projects (university year, researchers and academics).

CNRS Mathematics is open to receiving applications for this call from researchers working at a UMR in the remit of another institute (CNRS Engineering, CNRS Physics, CNRS Biology, etc.). Applicants should start by discussing this with their UMR director and with the deputy scientific director / or other person in charge of international affairs at their own institute before contacting us.

For more information, please contact

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