Vijay V. S. P. Bhattiprolu, Mrinal Kanti Ghosh, Venkatesan Guruswami, Euiwoong Lee, Madhur Tulsiani. Multiplicative Approximations for Polynomial Optimization Over the Unit Sphere. Electronic Colloquium on Computational Complexity (ECCC), 23:185, 2016. [doi]
Abstract is missing.