Yoshiharu Kohayakawa

Yoshiharu Kohayakawa (Japanese: 小早川美晴; born 1963) is a Japanese-Brazilian mathematician working on discrete mathematics and probability theory. He is known for his work on Szemerédi's regularity lemma, which he extended to sparser graphs.

Biography
Kohayakawa was a student of Béla Bollobás at the University of Cambridge.

According to Google Scholar, as of August 21, 2019, Kohayakawa's works have been cited over 3194 times, and his h-index is 33.

He is a titular member of the Brazilian Academy of Sciences.

In 2000, five American researchers received a USA NSF Research Grant in the value of $20,000 to go to Brazil to work in collaboration with him on mathematical problems.

Kohayakawa has an Erdős number of 1.

He was awarded the 2018 Fulkerson Prize.