Philosophers and other theoreticians participated in the elaboration of Nazi ideology. Hans-Hermann Hoppe called Francis "one of the leading theoreticians and strategists of the Buchananite movement". This has led to significant interest in the systems by theoretical chemists and graph theoreticians. Some artists and theoreticians even added a political dimension to American modernism. Contrary to other genres of art, avant-garde creators were also its theoreticians and researchers. Many praxis theoreticians taught at various universities in Europe and US. Spanish anarchist theoreticians were somewhat divided on this subject. His work later affected a number of Russian Marxist theoreticians, including Nikolai Bukharin. He was one of the leading theoreticians of "Second Modernism". A subgroup of theoreticians was recruited and headed by a Czechoslovak physicist, George Placzek. Some theoreticians on the non-Communist left have emphasized the structural or systemic character of "imperialism". The theoreticians of OPOJAZ distinguished between practical and poetic language. Some theoreticians unify determiners and pronouns into a single class. Krylenko's views were opposed by some Soviet theoreticians, including Soviet Prosecutor General Andrey Vyshinsky. He was also considered one of the Communist Party's leading theoreticians.