Leetsch C. Hsu

[1] Hsu studied at Jiangsu Provincial Luoshe Normal School before the outbreak of the Second Sino-Japanese War.

[1] In 1949, Hsu was awarded a scholarship by the British Council for a two-year study in the United Kingdom.

[1] He was named Honorary Dean of the School of Science of the Nanjing University of Aeronautics and Astronautics.

[2] Hsu made significant contributions to asymptotic analysis, approximation theory, and combinatorics.

[1] He began collaborating with American mathematician Henry W. Gould in 1965, years before US President Richard Nixon established official relations with the People's Republic of China.

[4] Their collaboration resulted in the establishment of the Gould–Hsu Matrix Inversion Formula in 1973, which is important for computing combinatorial identities.