- South Ossetia (/ɒˈsɛtiə/ o-SET-ee-ə, less common: /ɒˈsiːʃə/ o-SEE-shə), officially the Republic of South Ossetia or the State of Alania, is a partially recognised landlocked state in the South Caucasus. It has an officially stated population of just over 56,500 people (2022), who live in an area of 3,900 square kilometres (1,500 sq mi), with 33,000 living in the capital city, Tskhinvali.
- Leonhard Euler (Wikipedia)
Leonhard Euler (/ˈɔɪlər/ OY-lər, German: [ˈleːɔnhaʁt ˈʔɔʏlɐ], Swiss Standard German: [ˈleːɔnhart ˈɔʏlər]; 15 April 1707 – 18 September 1783) was a Swiss mathematician, physicist, astronomer, geographer, logician, and engineer who founded the studies of graph theory and topology and made pioneering and influential discoveries in many other branches of mathematics such as analytic number theory, complex analysis, and infinitesimal calculus. He introduced much of modern mathematical terminology and notation, including the notion of a mathematical function. He is also known for his work in mechanics, fluid dynamics, optics, astronomy, and music theory.
