Svetlana Yakovlevna Jitomirskaya[a] (born June 4, 1966) is a mathematician working on dynamical systems and mathematical physics.

[2] In 2005, she was awarded the Ruth Lyttle Satter Prize in Mathematics, "for her pioneering work on non-perturbative quasiperiodic localization".

[9] After the Russian invasion of Ukraine in February 2022, congress organizers changed plans, and moved some events online, and others to Helsinki, Finland.

The award citation credited her "for work on the spectral theory of almost-periodic Schrödinger operators and related questions in dynamical systems.

In particular, for her role in the solution of the Ten Martini problem, concerning the Cantor set nature of the spectrum of all almost Mathieu operators and in the development of the fundamental mathematical aspects of the localization and metal-insulator transition phenomena.