On Fri, Feb 17, 2023, 10:43 user_gong Kim <ksi2...@gmail.com> wrote: > Hello, > > I have a question about rank of matrix. > At the problem > Au = b, > > In my case, sometimes global matrix A is not full rank. > In this case, the global matrix A is more likely to be singular, and if it > becomes singular, the problem cannot be solved even in the case of the > direct solver. > I haven't solved the problem with an iterative solver yet, but I would > like to ask someone who has experienced this kind of problem. > > 1. If it is not full rank, is there a numerical technique to solve it by > catching rows and columns with empty ranks in advance? > > 2.If anyone has solved it in a different way than the above numerical > analysis method, please tell me your experience. > > Thanks, > Hyung Kim >
My experience with this is usually associated to reading a book and find the solution I'm looking for. > > >
