Zhiwei Yun (Chinese: 恽之玮; pinyin: Yùn Zhīwěi; born September 1982) is a Chinese-born American mathematician and writer.

[3] As a high schooler, he participated in the International Mathematical Olympiad in 2000; he received a gold medal with a perfect score.

[4][5] His collaborations with Wei Zhang, Xinyi Yuan and Xinwen Zhu have received attention in publications such as Quanta Magazine and Business Insider.

[6][7] In particular, his work with Wei Zhang on the Taylor expansion of L-functions is "already being hailed as one of the most exciting breakthroughs in an important area of number theory in the last 30 years."

"[2] In December 2017, he was awarded the 2018 New Horizons In Mathematics Prize together with Wei Zhang, Aaron Naber and Maryna Viazovska.