The International Mathematical Union invites applications from mathematicians professionally based in developing countries to visit an international research collaborator for a period of one month.

In case the length of the visit exceeds one month, the candidate should provide evidence of financial support from the host institution to cover the living expenses beyond the first month.

Eligibility Criteria

The Applicants Must

1. hold at the time of application a PhD in Mathematics,

2. be based in a developing country at the time of application (As defined by IMU)

3. hold a position in a university/ research institution

4. be in the early stages of their professional careers, more precisely: the applicants should

This link will give you more details
https://www.mathunion.org/cdc/grants/research-travel-grants/abel-visiting-scholar-program