Maybe it is not a math question.
I have got my math PhD degree fro more than 10 years ago, and my major is algebra. I have published some papers in some journals such as Adv. Math.. I really love math, but I am still thinking I haven't getgot a good and complete math education, and do not have a good picture of math. Someone may argue that I can teach me math to myself. The problem is that I am a teather in a university now,now; I have to teach a lot of classes and have other duties. Now I have an idea which sounds crazy: I want to do another math PhD again. But the problem is I am almost 40 years old. So I am wondering if therethis is soem kind of realizability?possible. Does someone have such experience of such a second PhD?