نتایج جستجو برای: φ-injectivity

تعداد نتایج: 17960  

Journal: :journal of linear and topological algebra (jlta) 0
a mahmoodi department of mathematics, islamic azad university, central tehran branch, tehran, iran.

let φ be a w  -continuous homomorphism from a dual banach algebra to c. the notion of φ-connes amenability is studied and some characterizations is given. a type of diagonal for dual banach algebras is de ned. it is proved that the existence of such a diagonal is equivalent to φ-connes amenability. it is also shown that φ-connes amenability is equivalent to so-called φ-splitting of a certain s...

Journal: :Electr. J. Comb. 2013
Will Grilliette Deborah E. Seacrest Tyler Seacrest

This work connects the idea of a “blow-up” of a quiver with that of injectivity, showing that for a class of monic maps Φ, a quiver is Φ-injective if and only if all blow-ups of it are as well. This relationship is then used to characterize all quivers that are injective with respect to the natural embedding of Pn into Cn.

2008

Recall that the rank of a finitely generated group is the minimal number of elements needed to generate it. M. White [Whi02] has proven that the injectivity radius of M is bounded above by some function of rank(π1(M)). Building on a technique that he introduced, we show that if M is a hyperbolic 3-manifold fibering over the circle with fiber Σg and rank(π1(M)) 6= 2g + 1, then the diameter of M ...

2002
A. ARIAS A. GHEONDEA S. GUDDER

Quantum operations frequently occur in quantum measurement theory, quantum probability, quantum computation and quantum information theory. If an operator A is invariant under a quantum operation φ we call A a φ-fixed point. Physically, the φ-fixed points are the operators that are not disturbed by the action of φ. Our main purpose is to answer the following question. If A is a φ-fixed point, i...

2009
M. CHUAQUI

Combining the definition of Schwarzian derivative for conformal mappings between Riemannian manifolds given by Osgood and Stowe with that for parametrized curves in Euclidean space given by Ahlfors, we establish injectivity criteria for holomorphic curves φ : D → C. The result can be considered a generalization of a classical condition for univalence of Nehari.

2008
IAN BIRINGER

Recall that the rank of a finitely generated group is the minimal number of elements needed to generate it. In [Whi02], M. White proved that the injectivity radius of a closed hyperbolic 3-manifold M is bounded above by some function of rank(π1(M)). Building on a technique that he introduced, we determine the ranks of the fundamental groups of a large class of hyperbolic 3-manifolds fibering ov...

2003
Thierry Coulbois Mark Sapir Pascal Weil

Let V be a pseudovariety of finite groups such that free groups are residually V, and let φ:F (A) → F (B) be an injective morphism between finitely generated free groups. We characterize the situations where the continuous extension φ̂ of φ between the pro-V completions of F (A) and F (B) is also injective. In particular, if V is extension-closed, this is the case if and only if φ(F (A)) and its...

A. Mahmoodi

Let φ be a w-continuous homomorphism from a dual Banach algebra to C. The notion of φ-Connes amenability is studied and some characterizations is given. A type of diagonal for dual Banach algebras is dened. It is proved that the existence of such a diagonal is equivalent to φ-Connes amenability. It is also shown that φ-Connes amenability is equivalent to so-called φ-splitting of a certain short...

1999
V. I. PAULSEN

We consider projectivity and injectivity of Hilbert C*-modules in the categories of Hilbert C*-(bi-)modules over a fixed C*-algebra of coefficients (and another fixed C*-algebra represented as bounded module operators) and bounded (bi-)module morphisms, either necessarily adjointable or arbitrary ones. As a consequence of these investigations, we obtain a set of equivalent conditions characteri...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده ریاضی 1393

فرض کنیم ‎φ یک اتومورفیسم از گروه ‎g باشد. در این پایان نامه مرکزساز ‎φ‎ در ‎g‎ به صورت ‎cg(φ) = {x ∈ g∣φ(x) = x}‎ و جابجاگر ‎φ‎ در ‎g را با نماد [‎[g,φ نشان داده و به صورت ‎[g,φ] = ⟨x−1φ(x)∣x ∈ g⟩‎ تعریف می کنیم. در فصل ‎2‎ عمل(‎cg(φ روی زیرگروه جابجاگر[‎[g,φ را وقتی که ‎g چنددوری یا متاآبلی باشد مورد بررسی قرار داده ایم. نتایج مهمی که بر اساس این عمل به دست می آید عبارتند از :‎ قضیه ‎(1)‎ : ...

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