Yoshiharu Kohayakawa (Japanese: 小早川美晴; born 1963) is a Japanese-Brazilian mathematician working on discrete mathematics and probability theory.[1] He is known for his work on Szemerédi's regularity lemma, which he extended to sparser graphs.[2] [3]
Kohayakawa was a student of Béla Bollobás at the University of Cambridge.[4]
According to Google Scholar, as of August 21, 2019, Kohayakawa's works have been cited over 3194 times, and his h-index is 33.[5]
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.[6]
Kohayakawa has an Erdős number of 1.[7] [8]
He was awarded the 2018 Fulkerson Prize.