Who was William Schieffelin Claytor?

William Schieffelin Claytor (1908-1967) was an American mathematician known for his significant contributions to the field of topology and the study of manifolds. He was the first African American to earn a Ph.D. in mathematics from the University of Pennsylvania in 1933. Claytor's work focused on algebraic topology, and he was also a dedicated educator, influencing many students throughout his career. His legacy includes both his mathematical contributions and his role as a pioneer for African Americans in mathematics.