Hi All; Long time reader, first time poster. Here's a tricky one. I have a solid state NMR set of data in 3D. Let's say the signal phases in the three dimensions are: exp(i*(A+B*C+C)t_1) exp(i*(A+B*C+C)t_2) exp(i*(A+B*C+C)t_3) given the information, one should be able to (in theory) determine A,B,C... however given the fact that there is a patently non-linear term this is non-trivial. Any ideas?