Algebra
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© 2014 , Hindawi Publishing Corporation . All rights reserved.

Jordan Higher Derivable Mappings on Rings
Wed, 19 Nov 2014 00:00:00 +0000
http://www.hindawi.com/journals/algebra/2014/672387/
Let be a ring. We say that a family of maps is a Jordan higher derivable map (without assumption of additivity) on if (the identity map on ) and hold for all and for each . In this paper, we show that every Jordan higher derivable map on a ring under certain assumptions becomes a higher derivation. As its application, we get that every Jordan higher derivable map on Banach algebra is an additive higher derivation.
Mohammad Ashraf and Nazia Parveen
Copyright © 2014 Mohammad Ashraf and Nazia Parveen. All rights reserved.

Some Properties of Multiplicative Rings of Polynomials over Multiplicative Hyperrings
Mon, 27 Oct 2014 13:16:50 +0000
http://www.hindawi.com/journals/algebra/2014/392902/
The set of all polynomials , over a multiplicative hyperring , form a commutative group with respect to the componentwise addition (+) of the polynomials. For polynomials in , is a set of polynomials whose th components are chosen from the set , where and are the th and the th components of and , respectively. A multiplicative hyperring is polynomially structured if the hyperstructure is a multiplicative ring. The purpose of the paper is to study the properties of the multiplicative ring , corresponding to those of a polynomially structured multiplicative hyperring .
Utpal Dasgupta
Copyright © 2014 Utpal Dasgupta. All rights reserved.

Prime and Primary Elements in Multiplicative Lattices
Thu, 09 Oct 2014 09:48:11 +0000
http://www.hindawi.com/journals/algebra/2014/890312/
We investigate prime and primary elements in a compactly generated multiplicative lattice . By a counterexample, it is shown that a primary element in need not be primary. Some characterizations of primary and prime elements in are obtained. Finally, some results for almost prime and almost primary elements in with characterizations are obtained.
C. S. Manjarekar and A. V. Bingi
Copyright © 2014 C. S. Manjarekar and A. V. Bingi. All rights reserved.

The Relatively Free Groups Satisfy Noncentral Commutative Transitivity
Wed, 01 Oct 2014 09:37:35 +0000
http://www.hindawi.com/journals/algebra/2014/379030/
We prove that a free group, , relative to the variety, , of all groups simultaneously nilpotent of class at most and metabelian is such that the centralizer of every noncentral element is abelian. We relate that result to the model theory of such groups as well as a quest to find a relative analog in of a classical theorem of Benjamin Baumslag. We also touch briefly
on similar considerations in the varieties of nilpotent groups.
Anthony M. Gaglione, Seymour Lipschutz, and Dennis Spellman
Copyright © 2014 Anthony M. Gaglione et al. All rights reserved.

The Matrix Equation over Fields or Rings
Wed, 01 Oct 2014 06:34:40 +0000
http://www.hindawi.com/journals/algebra/2014/745029/
Let and let be an algebraically closed field with characteristic 0 or greater than . We show that if and satisfy , then are simultaneously triangularizable. Let be a reduced ring such that is not a zero divisor and let be a generic matrix over ; we show that is the sole solution of . Let be a commutative ring with unity; let be similar to such that, for every is not a zero divisor. If is a nilpotent solution of where , then .
Gerald Bourgeois
Copyright © 2014 Gerald Bourgeois. All rights reserved.

On Almost Semiprime Submodules
Wed, 10 Sep 2014 11:36:09 +0000
http://www.hindawi.com/journals/algebra/2014/752858/
We introduce the concept of almost semiprime submodules
of unitary modules over a commutative ring with nonzero identity. We investigate
some basic properties of almost semiprime and weakly semiprime
submodules and give some characterizations of them, especially for (finitely
generated faithful) multiplication modules.
Farkhonde Farzalipour
Copyright © 2014 Farkhonde Farzalipour. All rights reserved.

The Reducibility of a Special Binary Pentanomial
Tue, 02 Sep 2014 12:43:02 +0000
http://www.hindawi.com/journals/algebra/2014/482837/
Swan’s theorem determines the parity of the number of irreducible factors of a binary trinomial. In this work, we study the parity of the number of irreducible factors for a special binary pentanomial with even degree , where , and exactly one of , and is odd. This kind of irreducible pentanomials can be used for a fast implementation of trace and square root computations in finite fields of characteristic 2.
Ryul Kim and Yun Mi Kim
Copyright © 2014 Ryul Kim and Yun Mi Kim. All rights reserved.

Unions of Parafree Lie Algebras
Wed, 13 Aug 2014 09:18:21 +0000
http://www.hindawi.com/journals/algebra/2014/385397/
We consider unions of parafree Lie algebras and we prove that such unions are again parafree under some conditions.
Naime Ekici and Zehra Velioğlu
Copyright © 2014 Naime Ekici and Zehra Velioğlu. All rights reserved.

A Study of Inverse Problems Based on Two Kinds of Special Matrix Equations in Euclidean Space
Mon, 26 May 2014 00:00:00 +0000
http://www.hindawi.com/journals/algebra/2014/392467/
Two special classes of symmetric coefficient matrices were defined based on characteristics matrix; meanwhile, the expressions of the solution to inverse problems are given and the conditions for the solvability of these problems are studied relying on researching. Finally, the optimal approximation solution of these problems is provided.
Rui Huang, Xiaodong Wu, Ruihe Wang, and Hui Li
Copyright © 2014 Rui Huang et al. All rights reserved.

Demazure Descent and Representations of Reductive Groups
Sun, 25 May 2014 10:58:34 +0000
http://www.hindawi.com/journals/algebra/2014/823467/
We introduce the notion of Demazure descent data on a triangulated category and define the descent category for such data. We illustrate the definition by our basic example. Let be a reductive algebraic group with a Borel subgroup . Demazure functors form Demazure descent data on and the descent category is equivalent to .
Sergey Arkhipov and Tina Kanstrup
Copyright © 2014 Sergey Arkhipov and Tina Kanstrup. All rights reserved.

On Determinantal Varieties of Hankel Matrices
Mon, 28 Apr 2014 08:00:28 +0000
http://www.hindawi.com/journals/algebra/2014/970157/
Let be a class of Hankel matrices whose entries, depending on a given matrix , are linear forms in variables with coefficients in a finite field . For every matrix in , it is shown that the varieties specified by the leading minors of orders from 1 to have the same number of points in . Further properties are derived, which show that sets of varieties, tied to a given Hankel matrix, resemble a set of hyperplanes as regards the number of points of their intersections.
Edoardo Ballico and Michele Elia
Copyright © 2014 Edoardo Ballico and Michele Elia. All rights reserved.

Simplices in the Endomorphism Semiring of a Finite Chain
Sun, 27 Apr 2014 08:50:15 +0000
http://www.hindawi.com/journals/algebra/2014/263605/
We establish new results concerning endomorphisms of a finite chain, if the cardinality of the image of such endomorphism is no more than some fixed number. The semiring of all such endomorphisms can be seen as a simplex whose vertices are the constant endomorphisms. We explore the properties of these simplices.
Ivan Trendafilov
Copyright © 2014 Ivan Trendafilov. All rights reserved.

On Integral Manifolds for Leibniz Algebras
Thu, 24 Apr 2014 08:37:41 +0000
http://www.hindawi.com/journals/algebra/2014/875981/
We discuss several partial solutions to the socalled “coquecigrue problem” of Loday; these solutions parallel, but also generalize in several directions, the classical Lie groupLie algebra correspondence. Our study highlights some clear similarities between the split and nonsplit cases and leads us to a general unifying scheme that provides an answer to the problem of the algebraic structure of a coquecigrue.
Juan Monterde and Fausto Ongay
Copyright © 2014 Juan Monterde and Fausto Ongay. All rights reserved.

A Construction of Bent Functions of Variables from a Bent Function of Variables and Its Cyclic Shifts
Thu, 17 Apr 2014 10:08:48 +0000
http://www.hindawi.com/journals/algebra/2014/701298/
We present a method to iteratively construct new bent functions of variables from a bent function of variables and its cyclic shift permutations using minterms of variables and minterms of 2 variables. In addition, we provide the number of bent functions of variables that we can obtain by applying the method here presented, and finally we compare this method with a previous one introduced by us in 2008 and with the Rothaus and MaioranaMcFarland constructions.
JoanJosep Climent, Francisco J. García, and Verónica Requena
Copyright © 2014 JoanJosep Climent et al. All rights reserved.

Vertex Coalgebras, Coassociator, and Cocommutator Formulas
Sun, 02 Mar 2014 13:26:01 +0000
http://www.hindawi.com/journals/algebra/2014/861768/
Based on the definition of vertex coalgebra introduced by Hubbard, 2009, we
prove that this notion can be reformulated using coskew symmetry, coassociator and
cocommutator formulas without restrictions on the grading. We also prove that a
vertex coalgebra can be defined in terms of dual versions of the axioms of Lie conformal
algebra and differential algebra.
Florencia Orosz Hunziker and José I. Liberati
Copyright © 2014 Florencia Orosz Hunziker and José I. Liberati. All rights reserved.

On Ordered QuasiGammaIdeals of Regular Ordered GammaSemigroups
Mon, 09 Dec 2013 16:00:41 +0000
http://www.hindawi.com/journals/algebra/2013/565848/
We introduce the notion of ordered quasiideals of regular ordered semigroups and study the basic properties of ordered quasiideals of ordered semigroups. We also characterize regular ordered semigroups in terms of their ordered quasiideals, ordered right ideals, and left ideals. Finally, we have shown that (i) a partially ordered semigroup is regular if and only if for every ordered biideal , every ordered ideal , and every ordered quasiideal , we have and (ii) a partially ordered semigroup is regular if and only if for every ordered quasiideal , every ordered left ideal , and every ordered rightideal , we have that .
M. Y. Abbasi and Abul Basar
Copyright © 2013 M. Y. Abbasi and Abul Basar. All rights reserved.

Commutative and Bounded BEalgebras
Thu, 05 Dec 2013 14:33:53 +0000
http://www.hindawi.com/journals/algebra/2013/473714/
We introduce the notions of the commutative and bounded BEAlgebras. We give some related properties of them.
Zekiye Çiloğlu and Yılmaz Çeven
Copyright © 2013 Zekiye Çiloğlu and Yılmaz Çeven. All rights reserved.

On the Jacobson Radical of an Semiring
Mon, 07 Oct 2013 14:15:37 +0000
http://www.hindawi.com/journals/algebra/2013/272104/
The notion of ary semimodules is introduced so that the Jacobson radical of an semiring is studied and some wellknown results concerning the Jacobson radical of a ring (a semiring or a ternary semiring) are generalized to an semiring.
Yongwen Zhu
Copyright © 2013 Yongwen Zhu. All rights reserved.

A Study on Fuzzy Ideals of Groups
Thu, 26 Sep 2013 11:15:48 +0000
http://www.hindawi.com/journals/algebra/2013/594636/
Using the idea of the new sort of fuzzy subnearring of a nearring, fuzzy subgroups, and their generalizations defined by various researchers, we try to introduce the notion of ()fuzzy ideals of groups. These fuzzy ideals are characterized by their level ideals, and some other related properties are investigated.
B. Davvaz and O. Ratnabala Devi
Copyright © 2013 B. Davvaz and O. Ratnabala Devi. All rights reserved.

Two Interacting Coordinate Hopf Algebras of Affine Groups of Formal Series on a Category
Thu, 19 Sep 2013 13:14:34 +0000
http://www.hindawi.com/journals/algebra/2013/370618/
A locally finite category is defined as a category in which every arrow admits only finitely many
different ways to be factorized by composable arrows. The large algebra of such categories over
some fields may be defined, and with it a group of invertible series (under multiplication). For
certain particular locally finite categories, a substitution operation, generalizing the usual substitution
of formal power series, may be defined, and with it a group of reversible series (invertible
under substitution). Moreover, both groups are actually affine groups. In this contribution, we
introduce their coordinate Hopf algebras which are both free as commutative algebras. The
semidirect product structure obtained from the action of reversible series on invertible series by
antiautomorphisms gives rise to an interaction at the level of their coordinate Hopf algebras
under the form of a smash coproduct.
Laurent Poinsot
Copyright © 2013 Laurent Poinsot. All rights reserved.

Construction and Composition of Rooted Trees via Descent Functions
Tue, 27 Aug 2013 16:06:44 +0000
http://www.hindawi.com/journals/algebra/2013/543913/
We propose a novel approach for studying rooted trees by using functions that we will call descent functions. We provide a construction method for rooted trees that allows to study their properties through the use of descent functions. Moreover, in this way, we are able to compose rooted trees with each other. Such a new composition of rooted trees is a very powerful tool applied in this paper in order to obtain important results as the creation of new rational and Pythagorean trees.
Marco Abrate, Stefano Barbero, Umberto Cerruti, and Nadir Murru
Copyright © 2013 Marco Abrate et al. All rights reserved.

Some Results on Strict Graded Categorical Groups
Mon, 26 Aug 2013 09:25:24 +0000
http://www.hindawi.com/journals/algebra/2013/306978/
We present some applications of strict graded categorical groups to the construction of the obstruction of an equivariant kernel and to the classification of equivariant group extensions which are central ones. The composition of a graded categorical group and an equivariant group homomorphism is also determined.
Nguyen Tien Quang and Che Thi Kim Phung
Copyright © 2013 Nguyen Tien Quang and Che Thi Kim Phung. All rights reserved.

A Characterization of Projective Special Unitary Group U3(7) by nse
Sat, 24 Aug 2013 08:07:54 +0000
http://www.hindawi.com/journals/algebra/2013/983186/
Let a group and be the set of element orders of . Let and let be the number of elements of order in . Let nse. In Khatami et al. and Liu's works, and are uniquely determined by nse. In this paper, we prove that if is a group such that nse = nse, then .
Shitian Liu
Copyright © 2013 Shitian Liu. All rights reserved.

On QuasiDense Submodules and Pure Envelopes of QTAG Modules
Mon, 29 Jul 2013 10:40:07 +0000
http://www.hindawi.com/journals/algebra/2013/873193/
A module over an associative ring with unity is a QTAG module if every finitely generated submodule of any homomorphic image of is a direct sum of uniserial modules. There are many fascinating properties of QTAG modules of which pure submodules and high submodules are significant. A submodule is quasidense in if is divisible, for every pure submodule of containing Here we study these submodules and obtain some interesting results. Motivated by neat envelope, we also define pure envelope of a submodule as the pure submodule if has no direct summand containing We find that pure envelopes of have isomorphic basic submodules, and if is the direct sum of uniserial modules, then all pure envelopes of are isomorphic.
Alveera Mehdi, Fahad Sikander, and Firdhousi Begum
Copyright © 2013 Alveera Mehdi et al. All rights reserved.

A Note on Hobby’s Theorem of Finite Groups
Sun, 07 Jul 2013 08:56:25 +0000
http://www.hindawi.com/journals/algebra/2013/135045/
It is well known that the Frattini subgroups of any finite groups are nilpotent. If a finite group is not nilpotent, it is not the Frattini subgroup of a finite group. In this paper, we mainly discuss what kind of finite nilpotent groups cannot be the Frattini subgroup of some finite groups and give some results. Moreover, we generalize Hobby’s Theorem.
Qingjun Kong
Copyright © 2013 Qingjun Kong. All rights reserved.

The Depth of Generalized Full Terms and Generalized Full Hypersubstitutions
Wed, 26 Jun 2013 15:17:15 +0000
http://www.hindawi.com/journals/algebra/2013/396464/
We generalize the concept of a full term which was introduced by Denecke and Changphas and the concept of the depth of a hypersubstitution which was introduced by Denecke et al. to the depth of a generalized full term and the depth of a generalized full hypersubstitution and then derive the formular for its depth.
Sarawut Phuapong and Sorasak Leeratanavalee
Copyright © 2013 Sarawut Phuapong and Sorasak Leeratanavalee. All rights reserved.

Bound on the Minimum Eigenvalue of Matrices Involving Hadamard Products
Wed, 19 Jun 2013 08:49:09 +0000
http://www.hindawi.com/journals/algebra/2013/102438/
We present a new lower bound on the minimum eigenvalue of matrices involving Hadamard products , and we show that our lower bound is larger than the lower bound . Three examples verify our result.
Kun Du, Guiding Gu, and Guo Liu
Copyright © 2013 Kun Du et al. All rights reserved.

Finite Groups with Some Supplemented Subgroups
Tue, 18 Jun 2013 14:23:16 +0000
http://www.hindawi.com/journals/algebra/2013/153691/
Let be a subgroup of a finite group , a prime dividing the order of , and a Sylow subgroup of for prime We say that is supplemented in if there is a subgroup of such that and where denotes the subgroup of generated by all those subgroups of which are quasinormally embedded in In this paper, we characterize nilpotency and supersolvability of under the assumption that all maximal subgroups of are supplemented in .
Guo Zhong, Liying Yang, Huaquan Wei, Xuanlong Ma, and Jiayi Xia
Copyright © 2013 Guo Zhong et al. All rights reserved.

On Cogenerated Commutative Unital Algebras
Wed, 05 Jun 2013 13:38:42 +0000
http://www.hindawi.com/journals/algebra/2013/452862/
GelfandNaimark's theorem states that every commutative algebra is isomorphic to a complex valued algebra of continuous functions over a suitable compact space. We observe that for a completely regular space , is denseseparable if and only if is cogenerated if and only if every family of maximal ideals of with zero intersection has a subfamily with cardinal number less than and zero intersection. This gives a simple characterization of cogenerated commutative unital algebras via their maximal ideals.
Ehsan Momtahan
Copyright © 2013 Ehsan Momtahan. All rights reserved.

Wronskian Envelope of a Lie Algebra
Wed, 29 May 2013 10:56:18 +0000
http://www.hindawi.com/journals/algebra/2013/341631/
The famous PoincaréBirkhoffWitt theorem states that a Lie algebra, free as a module, embeds
into its associative envelope—its universal enveloping algebra—as a subLie algebra for the usual commutator Lie bracket. However, there is another functorial way—less known—to associate a Lie algebra to an associative algebra and inversely. Any commutative algebra equipped with a derivation , that is, a commutative differential algebra, admits a Wronskian bracket under which it becomes a Lie algebra. Conversely, to any Lie algebra a commutative differential algebra is universally associated, its Wronskian envelope, in a way similar to the associative envelope. This contribution is the beginning of an investigation of these relations between Lie algebras and differential algebras which is parallel to the classical theory. In particular, we give a sufficient condition under which a Lie algebra may be embedded into its Wronskian envelope, and we present the construction of the free Lie algebra with this property.
Laurent Poinsot
Copyright © 2013 Laurent Poinsot. All rights reserved.