Xxx: I remembered a story told us by one of the teachers at the institute. There was such an outstanding mathematician Georg Kantor, the creator of the theory of sets. His work simply turned mathematics. But, unfortunately, Kantor suffered from a mental disorder, which by the end of his life worsened so much that he eventually died in a psychiatric hospital. But even while there, Kantor continued to give lectures on his ideas to other mathematicians. This was possible because in the morning his condition was much better than near the evening. Accordingly, in the morning he was brought to the university to read a lecture, which was watched by a couple of experienced sanitary practitioners. The task of the sanitarians was to determine when Kantor would start to get a dim mind, to interrupt the lecture and bring the mathematician back to the clinic. And often these lectures ended in a conflict between the medical practitioners and the mathematicians who listened to her on such a scheme.

The sanitary:

Okay, enough for today!

The Mathematics:

Wait and wait! The most interesting has just begun!