Oleg Viro

Using this technique, Viro completed the isotopy classification of non-singular plane projective curves of degree 7.

The patchworking technique was one of the fundamental ideas which motivated the development of tropical geometry.

Viro studied at the Leningrad State University where he received his Ph.D. degree in 1974; his advisor was Vladimir Rokhlin.

[3] A number of Swedish, European and American mathematicians protested the manner in which the two Professors of Mathematics were forced to resign.

These protests include the following: As of 2009, Viro is a senior researcher at the St. Petersburg Department of the Steklov Institute of Mathematics, and a professor at Stony Brook University.