New method for the determination of the quantum yields in the photo-isomerization of photochromic epoxydiarylindanones

A method for the determination of the quantum yield in the formation of the unstable photoinduced form of 2, 3-epoxy-2, 3-diphenylindanone based on the reaction with tetracyanoethylene is proposed. The products of 1,3-dipolar addition of tetracyanoethylene to the photoinduced forms of the investigated compounds were isolated and characterized.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 167–170, February, 1984.     

New MnO–Nb(Ta)2O5 Phases Produced at High Pressures and Temperatures

Phase formation at high pressures and temperatures were studied in the MnO–Nb(Ta)₂O₅ system. New rhombohedral modifications of Mn₄Nb₂O₉ and Mn₄Ta₂O₉, two new modifications of MnTa₂O₆, and two modifications of Mn₂Ta₂O₇ were obtained. They were structurally identified.     

Branching processes. I

The main results obtained from 1968 to 1983 in the theory of Markov branching processes and processes with transformations depending on the age of particles are reflected in this article. Along with the traditional sections (integral and local theorems, stationary measures), the survey includes sections devoted to statistics of branching processes. The bibliography contains mainly works reviewed in RZh Matematika.Translated from Itogi Nauki i Tekhniki, Seriya Teoriya Veroyatnostei, Matematicheskaya Stati tika, Teoreticheskaya Kibernetika, Vol. 23, pp. 3–67, 1985.     

Current control with a variable inductance

Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 2, pp. 182–187, March–April, 1990.     

Semisimple Representations of Quivers in Characteristic p

We prove that the results of Le Bruyn and Procesi on the varieties parameterizing semisimple representations of quivers hold over an algebraically closed base field of arbitrary characteristic.