Over Gowers’s blog Tim and I will make an attempt to revisit polymath5. Last Autumn I prepared three posts on the problems and we decided to launch them now. The first post is here. Here is a related MathOverflow question. Discrepancy theory is a wonderful theory and while I am not an expert we had several posts about it here. (This post on Beck-Fiala and related matters; and this news item on Beck’s 3-permutation conjecture.) I am aware of at least one important recent development in the theory that I did not report. My posts go around the problem and do not attack it directly but I hope people will have a chance to think about the problem again and perhaps also about polymathing again. Meanwhile, polymath7 (over the polymath blog) is in a short recess but I hope a new research thread will start soon.