Dr. Simonetta Frittelli's research is centered in general relativity and has a wide scope, ranging from the mathematical foundations of simulations of dynamical gravitating systems to astrophysical applications. Her main interests reside in applying results from the theory of partial differential equations to the Einstein system, in order to advance strategies for improving the stability and accuracy of computer simulations.Most of her work in this area applies to the case of spacelike foliations of spacetime and first-order representations of the Einstein equations in varied gauges. She collaborates in the study of numerical simulations in the characteristic representation as well. Beyond the Einstein equations themselves, her interests include enhancing the accuracy of the mass estimates arising from the gravitationally lensed images of astrophysical beacons at cosmological distances.