Hello all, I am an amateur "physicist" just tinkering and experimenting with my son, and as I read the posts about different concepts, I can get the general idea of what is being explained. However, when it comes to the math (equations for the wave functions, calculating eigenstates, etc.) I am totally lost, and I was wondering if anyone had suggestions on a book or website that I could use to try and understand how to do these calculations. I know algebra and I have taken some calculus, though I haven't used it in years, and I am unfamiliar with a lot of the terms and symbols used in these equations. Any source to help me get a grip on the mathematics would be great.