Homomorphism

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1 - Characterization of n–Jordan homomorphisms on Banach algebras
Abbas Zivari Kazem Pour Abasalt Bodaghi

In this paper we prove that every n-Jordan homomorphis varphi:mathcal {A} longrightarrowmathcal {B} from unital Banach algebras mathcal {A} into varphi -commutative Banach algebra mathcal {B} satisfiying the condition varphi (x^2)=0 Longrightarrow varphi (x)=0, xin math More

In this paper we prove that every n-Jordan homomorphis varphi:mathcal {A} longrightarrowmathcal {B} from unital Banach algebras mathcal {A} into varphi -commutative Banach algebra mathcal {B} satisfiying the condition varphi (x^2)=0 Longrightarrow varphi (x)=0, xin mathcal {A}, is an n-homomorphism. In this paper we prove that every n-Jordan homomorphism varphi:mathcal {A} longrightarrowmathcal {B} from unital Banach algebras $mathcal{A} into varphi$-commutative Banach algebra $mathcal {B}. satisfiying the condition varphi (x^2)=0 Longrightarrow varphi (x)=0, xin mathcal {A}, is an n-homomorphism. This result was proved in cite {zivari1} for 3-Jordan homomorphism with the additional hypothesis that the Banach algebra mathcal {A} is unital, and it is extended for all nin mathbb {N} in cite {An}. Later, for nin lbrace 3,4 rbrace, Theorem ref {T1} proved in cite {Bodaghi1} by considering an extra condition varphi (ab^2)= varphi (b^2a), (a,bin mathcal {A}). Some significant results concerning Jordan homomorphisms and their automatic continuity on Banach algebras obtained by the author in cite {zivari}, cite {zivari2} and cite {zivari3}. In this paper, under special hypotheses we prove that every n-Jordan homomorphism varphi from Banach algebra mathcal {A} into Banach algebra mathcal {B} is an n-homomorphism. Manuscript profile

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2 - Ideal of Lattice homomorphisms corresponding to the products of two arbitrary lattices and the lattice [2]
Leila Sharifan Ghazaleh Malekbala

Abstract. Let L and M be two finite lattices. The ideal J(L,M) is a monomial ideal in a specific polynomial ring and whose minimal monomial generators correspond to lattice homomorphisms ϕ: L→M. This ideal is called the ideal of lattice homomorphism. In this paper, More

Abstract. Let L and M be two finite lattices. The ideal J(L,M) is a monomial ideal in a specific polynomial ring and whose minimal monomial generators correspond to lattice homomorphisms ϕ: L→M. This ideal is called the ideal of lattice homomorphism. In this paper, we study J(L,M) in the case that L is the product of two lattices L_1 and L_2 and M is the chain [2]. We first characterize the set of all lattice homomorphisms ϕ:L→[2] according to the set of all lattice homomorphisms ϕ_1:L_1→[2] and the set of all lattice homomorphisms ϕ_2:L_2→[2]. Then, by using it and the set of associated prime ideals of both J(L_1,[2] ) and J(L_2,[2]), we study the associated prime ideals of J(L,[2]). Next, we assume that L_1=[2] and we characterized ass (J (L,[2])). Then by mapping cone technique and minimal free resolution of J(L_2,[2]), we find a free resolution of J(L,[2]) and an upper bound for the projective dimension of J(L,[2]). Finally, under the above assumptions and for the case that L_2=[n], we compute the minimal free resolution of J(L,[2]). Manuscript profile

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3 - 𝛅- homomorphism maps into dual Banach algebras
B. Hayati H. Khodaei

Let A be a Banach algebra and (B,B_*) be a dual Banach algebra. A linear map φ:A⟶B is said to be a δ - homomorphism map if ‖‖φ(a_1 a_2)-φ(a_1)φ(a_2)‖‖≤δ‖‖a_1‖‖ ‖‖a_2 ‖‖ for every a_1,a_2∈A. In this paper, we study the δ - homomo More

Let A be a Banach algebra and (B,B_*) be a dual Banach algebra. A linear map φ:A⟶B is said to be a δ - homomorphism map if ‖‖φ(a_1 a_2)-φ(a_1)φ(a_2)‖‖≤δ‖‖a_1‖‖ ‖‖a_2 ‖‖ for every a_1,a_2∈A. In this paper, we study the δ - homomorphism maps from A into B. Among other things, we prove that if φ:A⟶B is a δ - homomorphism map and B_* is multiplicative on the algebra generated by φ(A), then φ is bounded and ‖‖φ‖‖≤1+δ. Let A be a Banach algebra and (B,B_*) be a dual Banach algebra. A linear map φ:A⟶B is said to be a δ - homomorphism map if ‖‖φ(a_1 a_2)-φ(a_1)φ(a_2)‖‖≤δ‖‖a_1‖‖ ‖‖a_2 ‖‖ for every a_1,a_2∈A. In this paper, we study the δ - homomorphism maps from A into B. Among other things, we prove that if φ:A⟶B is a δ - homomorphism map and B_* is multiplicative on the algebra generated by φ(A), then φ is bounded and ‖‖φ‖‖≤1+δ. Manuscript profile

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4 - Continuity of almost multipliers on Banach algebras
Mohammad Reza Omidi Abbas zivari-kazempour Abasalt Bodaghi

: In this paper, we prove that every multipliers on without order Banach algebra A is almost homomorophisms. Also we investigate the continuity of approximate multipliers and under special hypothesis we show that each approximate multiplier T:A⟶A is continuous.: In this More

: In this paper, we prove that every multipliers on without order Banach algebra A is almost homomorophisms. Also we investigate the continuity of approximate multipliers and under special hypothesis we show that each approximate multiplier T:A⟶A is continuous.: In this paper, we prove that every multipliers on without order Banach algebra A is almost homomorophisms. Also we investigate the continuity of approximate multipliers and under special hypothesis we show that each approximate multiplier T:A⟶A is continuous.: In this paper, we prove that every multipliers on without order Banach algebra A is almost homomorophisms. Also we investigate the continuity of approximate multipliers and under special hypothesis we show that each approximate multiplier T:A⟶A is continuous.: In this paper, we prove that every multipliers on without order Banach algebra A is almost homomorophisms. Also we investigate the continuity of approximate multipliers and under special hypothesis we show that each approximate multiplier T:A⟶A is continuous. Manuscript profile

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5 - POINT DERIVATIONS ON BANACH ALGEBRAS OF α-LIPSCHITZ VECTOR-VALUED OPERATORS
Abbasali Shokri

The Lipschitz function algebras were first defined in the 1960s by some mathematicians, including Schubert. Initially, the Lipschitz real-value and complex-value functions are defined and quantitative properties of these algebras are investigated. Over time these algebr More

The Lipschitz function algebras were first defined in the 1960s by some mathematicians, including Schubert. Initially, the Lipschitz real-value and complex-value functions are defined and quantitative properties of these algebras are investigated. Over time these algebras have been studied and generalized by many mathematicians such as Cao, Zhang, Xu, Weaver, and others. Let be a non-empty compact metric space and be a unital commutative Banach space over the scalar field , and . In this paper, we first introduce the Banach algebras of vector-valued (B-valued) -Lipschitz operators on , and , then we study the point derivations on them. In the main results of this paper, we prove that all continuous point derivatives on are zero, and at any non-isolated point X, there is a non-zero continuous point derivation on . Manuscript profile

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6 - A Note on Spectrum Preserving Additive Maps on C*-Algebras
Ali Taghavi

Mathieu and Ruddy proved that if be a unital spectral isometry from a unital C*-algebra Aonto a unital type I C*-algebra B whose primitive ideal space is Hausdorff and totallydisconnected, then is Jordan isomorphism. The aim of this note is to show that if be asurjectiv More

Mathieu and Ruddy proved that if be a unital spectral isometry from a unital C*-algebra Aonto a unital type I C*-algebra B whose primitive ideal space is Hausdorff and totallydisconnected, then is Jordan isomorphism. The aim of this note is to show that if be asurjective spectrum preserving additive map, then is a Jordan isomorphism without the extraassumption totally disconnected. Manuscript profile

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7 - Groups and Ultra-groups
Gh. Moghaddasi P. Zolfaghari B. Tolue Haghighi

In this paper, in addition to some elementary facts about the ultra-groups, which their structure based on the properties of the transversal of a subgroup of a group, we focus on the relation between a group and an ultra-group. It is verified that every group is an ultr More

In this paper, in addition to some elementary facts about the ultra-groups, which their structure based on the properties of the transversal of a subgroup of a group, we focus on the relation between a group and an ultra-group. It is verified that every group is an ultra-group, but the converse is not true generally. We present the conditions under which, for every normal subultra-group of an ultra-group over a group, there exists a normal subgroup of that certain group. Moreover, by proving this feature that a monomorphism in groups preserve the ultra-groups over groups, we show that, corresponding to any monomorphism in groups, there is an ultra-group homomorphism on the subgroups of those groups. Finally, we prove isomorphism theorems for ultra-groups. These theorems connect three notions subultra-group, normal subultra-group, quotient ultra-group, and directly, similar to the isomorphism theorems in group theory and module theory are proved. Manuscript profile

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8 - Transformation of BL-general Fuzzy Automata
A. Saeidi Rashkolia M. Shamsizadeh

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9 - A Study on Intuitionistic Fuzzy and Normal Fuzzy M-Subgroup, M-Homomorphism and ‎Isomorphism‎
M. Oqla Massa'deh

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10 - ‎Fuzzy Subgroups and Digraphs Induced by Fuzzy Subgroups
Paul J. Allen Joseph Neggers Hee Sik Kim

10.30495/tfss.2022.690699

Given a fuzzy subgroup $\mu$ of a group $G$‎, ‎$x\rhd_uy$ if and only if $\mu(xy) < \mu(yx)$ defines a directed relation with an associated digraph $(G‎, ‎\rhd_u)$‎. ‎We consider $(\mu‎, ‎\nu)$-homomorphisms $\varphi‎: ‎(G‎, ‎\mu)\to (H‎, ‎\nu)$ where $\mu$ and $\nu$ ar More

Given a fuzzy subgroup $\mu$ of a group $G$‎, ‎$x\rhd_uy$ if and only if $\mu(xy) < \mu(yx)$ defines a directed relation with an associated digraph $(G‎, ‎\rhd_u)$‎. ‎We consider $(\mu‎, ‎\nu)$-homomorphisms $\varphi‎: ‎(G‎, ‎\mu)\to (H‎, ‎\nu)$ where $\mu$ and $\nu$ are fuzzy subgroups of $G$ and $H$ respectively and the preservation of properties of the digraphs $(G‎, ‎\rhd_u)$ several of which are also noted here‎, ‎e.g.‎, ‎$(G‎, ‎\rhd_u)$ is an anti-chain if and only if $\mu$ is a fuzzy normal subgroup of the group $G$‎. Manuscript profile

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