I'm so happy that I saw this.

I was reminded of what I wanted to ask you a few weeks ago. How much do you know about the mathematics behind electromagnetism. I'm specifically interested in the superposition of (electro) magnetic fields. Is this cumulative? also at what distance would this not be feasible if I'm powering small coils? What level of precision could I expect to achieve? (Hoping for a mm or at around 1T.)