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Перегляд Algebra and Discrete Mathematics, 2008, Vol. 7 за назвою

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2008, Vol. 7 за назвою

Сортувати за: Порядок: Результатів:

  • Group action on bimodule categories 
    Drozd, Y.A. (Algebra and Discrete Mathematics, 2008)
    We consider actions of groups on categories and bimodules, the related crossed group categories and bimodules, and prove for them analogues of the result know for representations of crossed group algebras and categories.
  • Idempotent D -cross-sections of the finite inverse symmetric semigroup ISn 
    Pyekhtyeryev, V. (Algebra and Discrete Mathematics, 2008)
    We prove that every finite poset can be embedded in some idempotent D-cross-section of the finite inverse symmetric semigroup ISn.
  • Information on the conference in Ring Theory (Porto Alegre, Brazil, September, 2008) 
    Автор відсутній (Algebra and Discrete Mathematics, 2008)
    The Conference in Ring Theory dedicated to the 70th anniversary of Professor Miguel Ferrero was held from 25 to 27 of Sepetember of 2008 in Porto Alegre, Brazil
  • Lie algebras associated with quadratic forms and their applications to Ringel-Hall algebras 
    Kosakowska, J. (Algebra and Discrete Mathematics, 2008)
    We define and investigate Lie algebras associated with quadratic forms. We also present their connections with Lie algebras and Ringel-Hall algebras associated with representation directed algebras.
  • Mathematics competition 2009 
    Автор відсутній (Algebra and Discrete Mathematics, 2008)
    Mathematics competition 2009 sponsored by Shevchenko Scientific Society (USA) and U.S.-Ukraine Foundation with the support of Ukrainian and Kyiv Mathematical Societies and hon. Roman Popadiuk – first U.S. ambassador to ...
  • Miguel Ferrero 
    Dokuchaev, M.; Kirichenko, V.; Paques, A.; Sant’Ana, A. (Algebra and Discrete Mathematics, 2008)
  • Mykola Komarnytskyi 
    Автор відсутній (Algebra and Discrete Mathematics, 2008)
  • n -ary comodules over n -ary (co)algebras 
    Zekovic, B. (Algebra and Discrete Mathematics, 2008)
    In the paper we study connections between (co)modules over n-ary and binary (co)algebras.
  • On a question of A. N. Skiba about totally saturated formations 
    Safonov, V.G. (Algebra and Discrete Mathematics, 2008)
    It is proved that the lattice of τ-closed totally saturated formations of finite groups is distributive. This is a solution of Question 4.2.15 proposed by A. N. Skiba in his monograph "Algebra of Formations" (1997).
  • On classification of groups generated by 3-state automata over a 2-letter alphabet 
    Bondarenko, I.; Grigorchuk, R.; Kravchenko, R.; Muntyan, Y.; Nekrashevych, V.; Savchuk, D.; Sunic, Z. (Algebra and Discrete Mathematics, 2008)
    We show that the class of groups generated by 3-state automata over a 2-letter alphabet has no more than 122 members. For each group in the class we provide some basic information, such as short relators, a few initial ...
  • On some locally soluble infinite dimensional linear groups 
    Dashkova, O.Yu. (Algebra and Discrete Mathematics, 2008)
    The author investigates nonabelian locally soluble linear groups of infinite fundamental dimension and of infinite section p-rank all of whose proper nonabelian subgroups of infinite section p-rank are of finite fundamental ...
  • On tame semigroups generated by idempotents with partial null multiplication 
    Bondarenko, V.M.; Tertychna, O.M. (Algebra and Discrete Mathematics, 2008)
    Let I be a finite set without 0 and J a subset in I×I without diagonal elements (i,i). We define S(I,J) to be the semigroup with generators ei, where i∈I∪0, and the following relations: e0=0; e2i=ei for any i∈I; eiej=0 ...
  • On well p-embedded subgroups of finite groups 
    Hutsko, N.V.; Skiba, A.N. (Algebra and Discrete Mathematics, 2008)
    Let G be a finite group, H a subgroup of G and HsG the subgroup of H genarated by all those subgroups of H which are s-permutable in G. Then we say that H is well p-embedded in G if G has a quasinormal subgroup T such ...
  • On τ-closed totally saturated group formations with Boolean sublattices 
    Safonov, V.G. (Algebra and Discrete Mathematics, 2008)
    In the universe of finite groups the description of τ-closed totally saturated formations with Boolean sublattices of τ-closed totally saturated subformations is obtained. Thus, we give a solution of Question 4.3.16 proposed ...
  • Planar trees, free nonassociative algebras, invariants, and elliptic integrals 
    Drensky, V.; Holtkamp, R. (Algebra and Discrete Mathematics, 2008)
    We consider absolutely free algebras with (maybe infinitely) many multilinear operations. Such multioperator algebras were introduced by Kurosh in 1960. Multioperator algebras satisfy the Nielsen-Schreier property and ...
  • Radical functors in the category of modules over different rings 
    Burban, N.; Horbachuk, O. (Algebra and Discrete Mathematics, 2008)
    The category G of all left modules over all rings is studied. Necessary and sufficient conditions for a preradical functor on G to be radical are given. Radical functors on essential subcategories of G are investigated.
  • Random walks on finite groups converging after finite number of steps 
    Vyshnevetskiy, A.L.; Zhmud, E.M. (Algebra and Discrete Mathematics, 2008)
    Let P be a probability on a finite group G, P(n)=P∗…∗P (n times) be an n-fold convolution of P. If n→∞, then under mild conditions P(n) converges to the uniform probability U(g)=1|G| (g∈G). We study the case when the ...
  • The free spectra of varieties generated by idempotent semigroups 
    Pluhar, G.; Wood, J. (Algebra and Discrete Mathematics, 2008)
    We give an exact formula for the logarithm of the free spectra of band varieties.
  • The generalized dihedral groups Dih(Zn) as groups generated by time-varying automata 
    Woryna, A. (Algebra and Discrete Mathematics, 2008)
    Let Zn be a cubical lattice in the Euclidean space Rn. The generalized dihedral group Dih(Zn) is a topologically discrete group of isometries of Zn generated by translations and reflections in all points from Zn. We ...
  • The Tits alternative for generalized triangle groups of type (3,4,2) 
    Howie, J.; Williams, G. (Algebra and Discrete Mathematics, 2008)
    A generalized triangle group is a group that can be presented in the form G=⟨x,y |xp=yq=w(x,y)r=1⟩ where p,q,r≥2 and w(x,y) is a cyclically reduced word of length at least 2 in the free product Zp∗Zq=⟨x,y |xp=yq=1⟩. ...

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