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German Research Chairs in portrait

Abebe Geletu – German Research Chair at AIMS Ruanda

Abebe Geletu

Abebe Geletu

“Optimising systems will make a crucial contribution to modernising and technologising  Africa.”


“I have seen it all with my own eyes in Ethiopia where I was born. On the continent of Africa, agricultural foodstuffs frequently rot whilst still on the market. And at the same time, in other places there are shortages. There is a lack of production control, central warehouses and delivery chains. Rural populations are hit particularly badly; given drought and climate change, it is a real disaster. The distribution of agricultural products can be optimised using applied mathematics. But that is only one area I would like to modernise through my work,” says Abebe Geletu.

Since embarking on his doctorate in optimisation at TU Ilmenau, Germany, in 1999, Abebe Geletu has repeatedly expanded his expertise in this sub-area of applied mathematics and has played the leading role in various German Research Foundation projects on optimisation and operating complex systems with the help of stochastic programming. In 2018, he completed his habilitation at the Institute for Automation and Systems Engineering at TU Ilmenau.

At AIMS Rwanda he wants to familiarise junior researchers with the application potential of mathematics to solve economic and societal problems. In addition to teaching and research, he will channel his expertise into practical applications together with interdisciplinary teams of engineers, computer scientists, hydrologists and energy experts.
“Particularly in microgrids in rural areas,” Geletu explains, “water management and energy supply are two of the fields in which optimisation will help to combat poverty and hunger.”

Abebe Geletu is a visiting professor at Haramaya University, Ethiopia, connections which he intends to utilise for research collaborations. Partners at TU Ilmenau will play a special role in the research collaboration. Especially with regard to water management, Geletu will cooperate with Technion  – Israel Institute of Technology.

Jan Hązła – German Research Chair at AIMS RWANDA

Jan Hązła

Jan Hązła

“My priority is to make young African mathematicians specialising in discrete mathematics more visible internationally.”


After finishing his doctorate at ETH Zurich in 2016, computer scientist Jan Hązła completed a stint at AIMS Rwanda, teaching programming. From that time, he knows all about the great potential and interest amongst many African students in theoretical computer science and discrete mathematics – areas that, so far, have not played a major role in mathematics education on the African continent.

“It is my dream to mentor and promote excellent doctoral candidates and students so that the results of cooperation can be published in prestigious specialist journals,” says Hązła, referring to his plans as the incumbent of a chair dedicated to theoretical computer science.  Hązła wants to concentrate on providing personal mentoring for talented junior mathematicians at AIMS Rwanda. “I have good connections to thriving research groups in Germany, the United States and Switzerland and will do everything I can to connect my students at AIMS with international colleagues,” he explains. Cooperation with Goethe University in Frankfurt am Main, Germany, is one focus of his work.
Originally from Poland, Hązła’s own research interests include probability and coding theory. In practice, the computer scientist works at the interface between economic and societal issues such as whether opinion formation can be efficiently simulated using computer models.
Jan Hązła studied computer science in Kraków, Poland. After completing his doctorate at ETH Zurich and acquiring teaching experience at AIMS Rwanda in Kigali he became a postdoc at the Institute for Data, Systems und Society at Massachusetts Institute of Technology, Cambridge, USA. Most recently, he taught and conducted research as a postdoc at EPFL, Switzerland.

Bubacarr Bah – German Research Chair at AIMS South Africa

Bubacarr Bah

Bubacarr Bah

“Artifical Intelligence is becoming ever more important on the continent of Africa!”


In his field of work, he addresses the most important topics of our time: Big Data, machine learning and artificial intelligence. “These topics are becoming ever more important on the continent of Africa, too,” Bubacarr Bah predicts. Through his work, he wants to ensure that Africa is better equipped to meet future challenges in these areas. Since 2016, the mathematician from Gambia has held the German Research Chair in Mathematics with a Specialisation in Data Science at the African Institute for Mathematical Sciences (AIMS) in South Africa.

Two examples illustrate how his work is already making an impact: He cooperates with an agricultural firm that took thousands of aerial photographs of an orange plantation in order to predict crop yield. Bah and his team developed the requisite algorithms to evaluate the images. In addition, he cooperates with a medical research institute and helps to evaluate and interpret medical data which are increasingly being collected in Africa, as well. This could help to fight disease.

Bah completed his doctorate in applied and computational mathematics at the University of Edinburgh, UK, and subsequently continued his research at distinguished institutes at the École Polytechnique Fédérale de Lausanne (EPFL), Switzerland, and the University of Texas in Austin, United States. Returning to Africa is a great opportunity, he feels. “At AIMS I can not only continue my own research but also promote young mathematicians and build national and international networks.” He is convinced that talented mathematicians on the continent of Africa have good prospects.

Mouhamed Moustapha Fall – German Research Chair at AIMS Senegal

Moustapha Fall

Mouhamed Moustapha Fall

“Mathematics offers huge optimization potential to the African people.”


It was his teachers who had sparked his enthusiasm for mathematics when he was still a child, says Moustapha Fall. Having completed his doctorate at the renowned International School for Advanced Studies in Trieste, Italy, in 2009, he continued his research, amongst others, at Goethe University Frankfurt. His host at the time, Professor Tobias Weth, is full of praise: “He is completely unfazed by complicated, technically sophisticated issues” and was able to recognise lines connecting methods even between very disparate mathematical fields.

Since 2013, Moustapha Fall has held the AIMS Chair in M’bour, Senegal. His work is located at the intersection of analysis and geometry. His overarching goal is always to convince people of all educational backgrounds in Africa, whether graduates or illiterates, of the optimization potential of mathematics by using examples of practical applications. He thus tried to solve the problem of M’bour’s fishermen. He asked himself why they sometimes caught a lot of fish and sometimes hardly any.  In cooperation with Professor Agostino Merico from the Leibniz Centre for Tropical Marine Research in Bremen, he studied cooperation behaviour among fishermen in M’bour. The team developed a mathematical model to predict the behavioural conditions under which fishing becomes a sustainable practice or leads to a human-resource collapse. There is now an App with which other scientists, including behavioural economists, can study fishermen behaviour and fish stocks dynamics under different experimental conditions.

Olivier Menoukeu Pamen – German Research Chair at AIMS Ghana

Olivier Menoukeu Pamen

Olivier Menoukeu Pamen

“The opportunity to give something back to my continent is invaluable.”


“The opportunity to give something back to my continent is invaluable,” said Olivier Menoukeu Pamen when he assumed the AIMS Research Chair in Mathematics and its Applications in Ghana in October 2016. The extent to which Pamen’s expertise in his special fields of probability calculation and statistics can benefit the continent is illustrated by one of the mathematician’s current projects: Just as in many African countries, microcredits are also very popular in Ghana. Pamen’s research has shown, however, that lenders often lack experience in realistically calculating refinancing costs, default probability and external influencing factors. As a result, the credits and the estimated interest are often granted on the basis of false assumptions. In order to help lenders put their calculations on a reliable footing, since 2019, Pamen has been working together with an institute in Ghana that grants microcredits.

Pamen’s engagement with financial mathematics goes right back to his doctorate at the University of the Witwatersrand in South Africa. He subsequently spent several years in Europe. After a postdoctoral sojourn in Oslo, he held a permanent position in the Department of Financial and Actuarial Mathematics at the University of Liverpool, United Kingdom. At AIMS Ghana he wants to share his experience with the students and apply his knowledge to current and future challenges facing Africa.

Gisèle Mophou – German Research Chair at AIMS Cameroon

Gisèle Mophou

Gisèle Mophou

“Mathematics can help to solve some of the major problems of our times.”


“Mathematics can help to solve some of the major problems of our times,” says Gisèle Mophou, expressing her enthusiasm for her subject. She cites the example of her own working group at AIMS Cameroon where, from 2017 to the end of 2019, she holds the chair in Applied Mathematics with a Specialisation in Optimal Control: The researchers describe environmental pollution and health problems using mathematical tools from which they develop models that make the problems tangible and help to find ways of tackling them.

Mophou took a doctorate in numerical mathematics and assumed a professorship at the Université des Antilles et de la Guyane, Guadeloupe, in 2013. “I was looking for new challenges,” says the Cameroon-born researcher, explaining her motivation in accepting the chair at AIMS. “It was an opportunity to give something back to my own country.” She particularly promotes young, female researchers. “I have held lectures at universities and schools and told my own story, how, as a woman, I became a professor.” She wants to make people start thinking differently so that, in the future, more girls and women in Africa will be brave enough and also have the opportunity to enter academia.

Marc Sedjro – German Research Chair at AIMS South Africa

Marc Sedjro

Marc Sedjro

“I want my research to help refine existing methods and develop alternative approaches.”


Every year, tropical hurricanes claim lives and destroy entire regions. In Africa, the most recent example was Cyclone Idai which wrought devastation, especially in Mozambique, Zimbabwe and Malawi. If we want to reduce the impact of such storms in the future, better predictions about the exact path of the storm would be a way forward. “I want my research to help refine existing methods and develop alternative approaches,” says Marc Sedjro, describing one possible effect of his work. In 2019, the mathematician from Togo assumed the German Research Chair in Applied Mathematics with a Specialisation in Partial Differential Equations and Calculus of Variations at AIMS South Africa. He spent the previous two years in Tanzania as head of the AIMS Chair in Applied Mathematics.

In addition to fluid mechanics, Sedjro and his team conduct research into game theory. They investigate the mathematics behind large moving groups such as shoals of fish. In this field Sedjro also cooperates with the Information Theory Group at TU Berlin, Germany. He is well acquainted with the German research landscape having spent three years working on research at RWTH Aachen University after completing his doctorate at Georgia Institute of Technology in the United States.

Dealing with mathematics, Sedjro believes, has advantages that go beyond the subject itself: “Mathematics encourages logical thinking in general. We address issues without letting ourselves be influenced by emotions and opinions.” A skill that can prove very useful in many areas of life.