نتایج جستجو برای: V-covering group

تعداد نتایج: 1297342  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم 1377

chapter one is devotod to collect some notion and background informations, which are needed in the next chapters. it also contains some important statements which will be proved in a more general context later in this thesis. in chapter two, we show that if the marginal factor-group is of order np1...pk,n>1, then we obtain a bound for the order of the verbal subgroup. also a bound for the bear-...

Journal: :bulletin of the iranian mathematical society 2001
a. r. salemkar m. r. r. moghaddam

Journal: :bulletin of the iranian mathematical society 2011
b. mashayekhy h. mirebrahimi

Journal: :international journal of group theory 2014
daniela bubboloni cheryl e. praeger pablo spiga

let $gamma(s_n)$ be the minimum number of proper subgroups‎ ‎$h_i, i=1‎, ‎dots‎, ‎l $ of the symmetric group $s_n$ such that each element in $s_n$‎ ‎lies in some conjugate of one of the $h_i.$ in this paper we‎ ‎conjecture that $$gamma(s_n)=frac{n}{2}left(1-frac{1}{p_1}right)‎ ‎left(1-frac{1}{p_2}right)+2,$$ where $p_1,p_2$ are the two smallest primes‎ ‎in the factorization of $ninmathbb{n}$ an...

Journal: :bulletin of the iranian mathematical society 2011
k. mehrabadi a. iranmanesh

Journal: :journal of algebraic systems 2013
hanieh mirebrahimi fatemeh ghanei

in this paper, we verify the solvability of free product of finite cyclic groups with topological methods. we use cayley graphs and everitt methods to construct suitable 2-complexes corresponding to the presentations of groups and their commutator subgroups. in particular, using these methods, we prove that the commutator subgroup of $mathbb{z}_{m}*mathbb{z}_{n}$ is free of rank $(m-1)(n-1)$ fo...

1998
Jin Ho Kwak

G: a connected finite simple graph with vertex set V (G) and edge set E(G). Neighborhood N(v) of v : the set of vertices adjacent to v ∈ V (G). A map p : G̃ → G is a covering of G if p : V (G̃) → V (G) is surjective and p|N(ṽ) : N(ṽ) → N(v) is bijective for ∀v ∈ V (G) and ∀ṽ ∈ p−1(v). It is an n-fold covering if p is n-to-one. A covering p : G̃ → G is regular (or, A-covering) if there is a subgrou...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان 1390

we commence by using from a new norm on l1(g) the -algebra of all integrable functions on locally compact group g, to make the c-algebra c(g). consequently, we find its dual b(g), which is a banach algebra so-called fourier-stieltjes algebra, in the set of all continuous functions on g. we consider most of important basic theorems about this algebra. this consideration leads to a rather com...

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