Karol Baron: a little bit about him on his 70th birthday

Abstract

It is a great pleasure for us to write a few sentences about Karol Baron, our teacher, master, colleague and then also a friend of us. Of course such a sentence may be treated as a polite but very trivial one which could begin almost every tribute to a distinguished colleague. In this case, however, there is no doubt that we are completely heart-to-heart: mature enough not to do mind opinions of our previous boss and supervisor. We both (WJ and JM) have different experiences when thinking about Karol, so the story runs in two parallel lines.