My name is Ken Miller. I'm an independent-study person, 67 years of age. I retired a few years ago from an electrical engineering job, and recently got interested in pursuing (for my own fun) some aspects of math and physics that I didn't cover in school or work: group theory, calculus of variations, relativity, advanced mechanics, quantum theory, and others (including digging deeper into electromagnetic theory than I did either in school or work). Without others around me to consult, it's pretty easy for me to get stuck on a problem or even a concept, so I'm excited about finding Physics Forums--hurray! I will probably be mostly a beneficiary of others' wisdom for some time, but hope I can develop into a help for others at some point.