Hello everyone, I am a new student in QM, DFT, and the like, and I'm essentially teaching myself as I go along, so I'd like to pre-emptively apologize for my incompetence.

I was trying to run some spin-polarized calculations. I'm a little confused with how to determine the values for spinat. I know it should be rather trivial, but if someone can point me in the right direction as to where I could read up on this, it would be very much appreciated. Also, is this value just an intial guess that will evolve as the program runs (bad inputs just lead to a longer calculation), or is it imperative that I choose good values right away (bad values yield poor results).

Of course, an explanation would be much appreciated as well.

Cheers