Famous Bulgarian mathematicians April 2012

1. Famous Bulgarian mathematiciansApril 2012

2. Ivan Salabashev1853-1924 Has served three times as Minister of Finance of the unified Bulgarian state and spent the last 14 years of his life representing his country in Vienna. Was a founder, a chairman and an honorary member of Physics and Mathematics Society in Sofia. A National Mathematics Competition for students from 2 to 12 grade, named after him, is organized every year.

3. John Atanasoff 1903 -1995 Is the son of a Bulgarian immigrant in the USA. The 1973 decision of the patent suit Honeywell v. Sperry Rand named him the inventor of the first automatic electronic digital computer. His special purpose machine has come to be called the Atanasoff - Berry Computer. Atanasoff’s first national award for scientific achievements was the Order of Saints Cyril and Methodius, First Class, Bulgaria’s highest scientific honor bestowed to him in 1970, before the 1973 court ruling. In 1990, President George H. W. Bush awarded Atanasoff the United States National Medal of Technology, the highest U.S. honor conferred for achievements related to technological progress.

4. Academician Ivan Tsenov1883 – 1967 • Was born in Vratsa • Investigated solid bodies with one immovable point (so called holonomic system) with Lagrange equations. • Described non-holonomic systems (motion around moving center as a wheel of bicycle) by coordinates, time and derivative coordinates and time, and solved problems successfully. The equations for non-holonomicsystems were called Tsenov I equations. • Ivan Tsenov received three new equations, called Tsenov II equations during the 30s of the 20th century. • Was a corresponding member (1925) and a member of the Bulgarian Academy of Sciences (1929).