Right, I forgot to write. I’ve tried continuous relaxation and indeed Mosek and SDPT3 are able to solve the problem. The rang of the solution is from 19 to 23, so I guess it is the same as your results.
Right, I forgot to write. I’ve tried continuous relaxation and indeed Mosek and SDPT3 are able to solve the problem. The rang of the solution is from 19 to 23, so I guess it is the same as your results.