Gábor Székelyhidi (born 30 June 1981 in Debrecen) is a Hungarian mathematician, specializing in differential geometry.
Gábor Székelyhidi, the brother of László Székelyhidi, graduated from Trinity College, Cambridge with a bachelor's degree in 2002 (part 3 of Tripos 2003 with honours) and received from Imperial College London his Ph.D.
in 2006 under the supervision of Simon Donaldson with thesis Extremal metrics and K-stability.
Székelyhidi was a postdoc at Harvard University and was from 2008-2011 Ritt Assistant Professor at Columbia University.
At the University of Notre Dame he became an assistant Professor in 2011, an associate professor in 2014, and in 2016 a full professor.
His research deals with geometric analysis and complex differential geometry (Kähler manifolds), including the existence of canonical metrics (such as extremal Kähler and Kähler-Einstein metrics) on projective manifolds.
In 2014 he was an invited speaker at the International Congress of Mathematicians in Seoul.