Determining an unknown signal from a set of measurements is a fundamental problem in science and engineering. However, as the number of free parameters defining the signal increases, its tomographic ...
We analyze two popular semidefinite programming relaxations for quadratically constrained quadratic programs with matrix variables. These relaxations are based on vector lifting and on matrix lifting; ...
In this paper, we present new error bounds for the Lanczos method and the shift-and-invert Lanczos method for computing e -Ï„A v for a large sparse symmetric positive ...
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