Vladimir Grigorevich Boltyansky (Russian: Влади́мир Григо́рьевич Болтя́нский), also transliterated as Boltyanski, Boltyanskii, or Boltjansky, is a Soviet and Russian mathematician, educator and author of popular mathematical books and articles. He is best known for his books on topology, combinatorial geometry and Hilbert's third problem. https://en.wikipedia.org/wiki/Vladimi...