НЕВІДОМА «АРИФМЕТИКА» УКРАЇНСЬКОГО ВЧЕНОГО ВАСИЛЯ КОРВІН-КВАСОВСЬКОГО В СКЛАДІ КЕНІГСБЕРЗЬКОГО КАЛЕНДАРЯ НА 1730 РІК

The article is devoted to the unknown work on arithmetic of the Ukrainian scientist, mathematician, author of printed Cyrillic calendars Vasyl Korvin-Kvasovsky. He printed his calendars  in Chernihiv and Koenigsberg. These books contained calendar and chronological information for  the current year, and also included astrological, prognostic texts and texts on educational topics.  In his own printing house in Königsberg, Corwin-Kwasowski included in the Calendar for 1730  a manual for teaching arithmetic «Arithmetic, or digital science». This is the fi rst printed textbook  on arithmetic in Ukrainian by a Ukrainian scientist from the Ukrainian lands. The article attempts  to reconstruct the biography of Vasyl Korvin-Kvasovsky. He studied at the Königsberg Academy  and was a professor at the Universities of Krakow and Prague. This study examines his work as  an author and publisher of calendars. It was important to publish in 1719 the Calendar compiled  for the «Chernihiv Meridian». The last period of Corwin-Kwasowski’s life was associated with  Königsberg, where he held a number of respectable positions, received the privilege of operating his own printing house, where he published calendars. There are three known Königsberg  editions of Corwin Kwasowski’s calendars – for 1727 and two editions for 1730 (engraved and  typesetting). The article provides a detailed description of the typesetting Calendar for 1730,  which contains «Arithmetic». «Arithmetic, or digital science» is considered, which is the fi rst  part of the textbook. It consists of fi ve sections. The fi rst considers а numerical digit and numbers.  The following are the rules for calculating four mathematical operations – addition, subtraction,  multiplication, division. The article compares the basic concepts in the «Arithmetic, or digital  science» of Corvin-Kvasovsky and «Arithmetic» of Leontiy Magnitsky (Moscow, 1703). Based  on the analysis of the given explanations and examples, a conclusion is made about Vasyl KorvinKvasovsky as a talented teacher who embodied his teaching experience in a textbook on arithmetic.  In the Appendix to the article, for the fi rst time, the text of the fi rst printed «Arithmetic», written  in Ukrainian by Drohobych scientist Vasyl Korvin-Kvasovsky, is published in full.

Vasily Korvin-Kvasovsky, calendar, history of mathematics, arithmetic, Ukrainian old printed books, Konigsberg Cyrillic typography.