rime.util.dual_bisect.dual_solve_u

rime.util.dual_bisect.dual_solve_u(s, alpha, eps, verbose=False, n_iters=100, gtol=0, s_guess=None)

find exact u s.t. E_y[pi(x,y)] == alpha(x); transpose s to solve v

Note: provide s_guess when exclude_train=True to trim the search space