History of logic and "university" philosophy in Russia. The view from Kazan. On the basis of investigations of archival materials a picture is given of the conceptual and social history of "university" philosophy and logic in Russia (nineteenth to mid-twentieth centuries). Emphasis is placed on those features of Russian philosophy and logic which were characteristic of the thinkers - philosophers and logicians — of Kazan

This article deals with conceptual parallels between N. I. Lobachevsky's and N. A. Vasiliev's ideas. The emphasis is placed on heuristic prompts connected with Lobachevsky's geometry which promoted construction of imaginary logic by N. A. Vasiliev.