Joshua Allensworth Leslie was an African American mathematician born in Jamaica. He studied for his Ph.D. at the University of Paris advised by Henri Cartan. He was a professor at the University of Ibadan in Nigeria, Northwestern University in Evanston, Illinois, and Howard University. He was awarded a Major Research Instrumentation grant to study the application of topology and group theory to solving differential equations.
Find out more at: https://mathshistory.st-andrews.ac.uk/Biographies/Leslie_Joshua/