Landau's theorem for p-blocks of p-solvable groups.
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Burkhard Külshammer (1990)
Journal für die reine und angewandte Mathematik
Vdovin, E.P. (2000)
Siberian Mathematical Journal
Zalesskaya, E.N., Vorob'ev, N.N. (2009)
Sibirskij Matematicheskij Zhurnal
Wolfgang Knapp (1978)
Mathematische Zeitschrift
Ballester-Bolinches, A., Beidleman, J.C., Heineken, H., Pedraza-Aguilera, M.C. (2010)
Documenta Mathematica
Peter Schmid (1974)
Mathematische Zeitschrift
Julio Lafuente López (1979)
Revista Matemática Hispanoamericana
All groups to be considered are finite. The main result of this paper is the following: the normal Schunck classes compose a complete and distributive lattice antiisomorphic to the lattice composed by the Derived classes (s. [5]). It begins with a first section of machinery which establishes that the Derived classes are precisely the classes of groups G such that every simple section of G appartains to a σ-closed class (s. 1.6) of simple groups; therefore the Derived classes are a natural generalization...
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