OP-00038 Partially resolved A degree-4 Sum-of-Squares proof that ℂ⁶ has no seven mutually unbiased bases OC · mutually unbiased bases · Randomstrasse101 · semidefinite programming · Sum-of-Squares
OP-00057 Solution claimed The Lovász number of G(n, 1/2) CO · Lovász theta function · random graphs · Randomstrasse101 · semidefinite programming
OP-00062 Solution claimed Fitting ellipsoids to random points: the threshold d²/4 PR · ellipsoid fitting · phase transitions · random geometry · Randomstrasse101 · semidefinite programming