نتایج جستجو برای: sigma rigid modules
تعداد نتایج: 122719 فیلتر نتایج به سال:
The control of bacterial transcription initiation depends on a primary sigma factor for housekeeping functions, as well as alternative sigma factors that control regulons in response to environmental stresses. The largest and most diverse subgroup of alternative sigma factors, the group IV extracytoplasmic function sigma factors, directs the transcription of genes that regulate a wide variety o...
Let Λ be a preprojective algebra of type A, D, E, and let G be the corresponding semisimple simply connected complex algebraic group. We study rigid modules in subcategories Sub Q for Q an injective Λ-module, and we introduce a mutation operation between complete rigid modules in Sub Q. This yields cluster algebra structures on the coordinate rings of the partial flag varieties attached to G. R...
Abstract We prove that the solid ergodicity property is stable with respect to taking coinduction for a fairly large class of coinduced action. More precisely, assume $\Sigma <\Gamma $ are countable groups such $g\Sigma g^{-1}\cap \Sigma finite any $g\in \Gamma \setminus $. Then measure preserving action \curvearrowright X_0$ gives rise solidly ergodic equivalence relation if and only as...
Bacterial persistence is the phenomenon in which a genetically identical fraction of a bacterial population can survive exposure to stress by reduction or cessation of growth. Persistence in mycobacteria has been recently linked to a stress-response network, consisting of the MprA/MprB two-component system and alternative sigma factor sigma(E). This network contains multiple positive transcript...
We give an elementary proof of Iyama-Yoshino’s classification of rigid MCM modules on Veronese embeddings in P.
Twisted generalized Weyl algebras (TGWAs) A(R,σ,t) are defined over a base ring R by parameters σ and t, where is an n-tuple of automorphisms, t elements in the center R. We show that, for fixed σ, there natural algebra map \(A(R,\sigma ,tt^{\prime })\to A(R,\sigma ,t)\otimes _{R} ,t^{\prime })\). This gives tensor product operation on modules, inducing structure direct sum (over all t) Grothen...
We study maximal m-rigid objects in the m-cluster category C H associated with a finite dimensional hereditary algebra H with n nonisomorphic simple modules. We show that all maximal m-rigid objects in these categories have exactly n nonisomorphic indecomposable summands, and that any almost complete m-rigid object in C H has exactly m + 1 nonisomorphic complements. We also show that the maxima...
—For the design of complex systems both accurate and abstract models are required. Especially for analog subsystems this trade-off is difficult. The new SystemC AMS extensions [7] offer high simulation performance, but also serious restrictions. In this paper we model a switched capacitor sigma delta mod-ulator using the SystemC AMS extensions. The model combines high simulation performance whi...
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