Question: Where can one find information on which areas of mathematics are represented at which of the more than 20 universities in the Democratic People's Republic of Korea (DPRK), and on which mathematicians are working there?
The DPRK is a country with a population of about 25 million people, and it is industrialised to a degree which has permitted it to successfully construct nuclear weapons and ICBM's. So one would expect that there are a decent number of mathematicians working at its universities.
However as the country operates an intranet of its own, not much from there is visible from the open internet. -- So in particular Google will not help much further here. Also, most results by researchers from the DPRK are published only in national journals, and mathematicians from the country cannot be found in the Mathematics Genealogy Database. On the other hand, people in the DPRK who need the internet for their work do have access, but with some sites blocked and email possibly monitored.
Edit: The possibly most interesting source available on the open internet I found so far is NKScholar. -- But firstly articles posted on that site are paywallet with prices in local currency, and secondly the site is Korean-language only -- so I can't tell how much one can really find there. Maybe someone else can tell more.