Complex sentence: His thesis was "Some Points in the Theory of Positive Definite J-Fractions" (related to continued fractions) co-authored with H.S. Wall and making him the eleventh African American to earn a PhD.
Split into simpler sentences: His thesis was "Some Points in the Theory of Positive Definite J-Fractions" (related to continued fractions) co-authored with H.S. Wall. He was the eleventh African American to earn a PhD.