Dear Colleagues, I am writing to let you know that Weiping Li has decided to retire from OSU effective at the beginning of 2022. Weiping had an amazing research career that included significant contributions both to topology (à la Floer) and to mathematical finance. It has been great to have Weiping as a colleague and I'm sure that you will join me in congratulating him on his retirement and wishing him the best for the future. Anthony -- Anthony Kable Professor and Interim Head Department of Mathematics Oklahoma State University (MSCS 401 *** 405-744-8224 *** anthony.kable@okstate.edu)