Vladimir Andreyevich Uspensky

Vladimir A. Uspensky (Russian: Влади́мир Андре́евич Успе́нский; 27 November 1930 – 27 June 2018) was a Russian mathematician, linguist, writer, doctor of physics and mathematics (1964). He was born in Moscow. He was the author of numerous papers on mathematical logic and linguistics. In addition, he also penned a number of memoir essays. He led linguistic reform in Russian education.
Uspensky died in Moscow of heart failure on 27 June 2018, aged 87.