For all but one positive integer triplet (a, b, c) with a 6 b 6 c and b 6 6, we decide whether there are algebraic numbers α, β and γ of degrees a, b and c, respectively, such that α + β + γ = 0. The… (More)

For all but one positive integer triplet (a, b, c) with a 6 b 6 c and b 6 6, we decide whether there are algebraic numbers α, β and γ of degrees a, b and c, respectively, such that α+β+ γ = 0. The… (More)