5. Complementary treatments

5.1 Unwinding of bangs

The ambiguous nature of interferometric bangs has prompted an enormous, and no doubt disproportionate, amount of work on the subject. The problem is real, but we have seen that using pre-existing information, however incomplete, greatly reduces the difficulty. Using distance correlation has the same effect. The problem is easy to solve: reconstruct the missing integers behind the bangs by continuity. It is, however, probably impossible to solve in all possible cases of noise. Solutions tend asymptotically towards 100% without ever having any chance of reaching it. Verifications on closed circuits, annealing algorithms or various cost functions have been used to converge the process, leading to a wealth of methods