Daniel Krashen is the Presidential Professor of Mathematics. Krashen’s research is in algebra and arithmetic geometry including the study of division algebras, quadratic forms, local-global principles, moduli stacks, and derived categories. These areas have connections to a wide range of fields, including physics and cryptography. He has been awarded multiple NSF grants, including a CAREER award, as well as the prestigious Presidential Early Career (PECASE) award. He is a Fellow of the American Mathematical Society. His publications have appeared in top journals including Inventiones, Advances in Math, IMRN, and Crelle’s Journal. Krashen has also been active in promoting outreach and diversity in mathematics at a range of levels from middle school through early career professors.