This is a little embarrassing to admit, but I don’t feel like I learned mathematics well enough in graduate school. In particular, I do not know algebra—my specialty—well enough.
My solution? Go back and work through the textbooks and problems that I worked on (or should have worked on) in graduate school. This is how I have been spending my research time this semester. In the short term, this is foolish. This will not yield any new results. But I am hoping for long term gains in productivity.
I wish I would have learned the material better the first time, but this is thenext best thing.