Multiplication groups of quasigroups and loops III.
Tomáš Kepka, A. Jančařík (1997)
Acta Universitatis Carolinae. Mathematica et Physica
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Tomáš Kepka, A. Jančařík (1997)
Acta Universitatis Carolinae. Mathematica et Physica
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Albar, M.A., Huq, S.A. (2001)
International Journal of Mathematics and Mathematical Sciences
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Marco Riccardi (2007)
Formalized Mathematics
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The goal of this article is to formalize the Jordan-Hölder theorem in the context of group with operators as in the book [5]. Accordingly, the article introduces the structure of group with operators and reformulates some theorems on a group already present in the Mizar Mathematical Library. Next, the article formalizes the Zassenhaus butterfly lemma and the Schreier refinement theorem, and defines the composition series.
Tomáš Kepka, Jon D. Phillips (1997)
Commentationes Mathematicae Universitatis Carolinae
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Subnormal subgroups possessing connected transversals are briefly discussed.