نتایج جستجو برای: sigma rigid modules
تعداد نتایج: 122719 فیلتر نتایج به سال:
Let R be an associative ring with identity. It is shown that every Σ -cotorsion left R-module satisfies the descending chain condition on divisibility formulae. If R is countable, the descending chain condition on M implies that it must be Σ -cotorsion. It follows that, for countable R, the class of Σ -cotorsion modules is closed under elementary equivalence and pure submodules. The modules M t...
In this paper, we consider a depth inequality of Auslander which holds for finitely generated Tor-rigid modules over commutative Noetherian local rings. We raise the question whether such can be extended $n$-Tor-rigid modules, and obtain an affirmative answer $2$-Tor-rigid that are generically free. Furthermore, in appendix, use Dao's eta function determine new classes hypersurfaces quotient un...
We give a characterization of Σ-cotorsion modules over valuation domains in terms of descending chain conditions on certain chains of definable subgroups. We prove that pure submodules, direct products and modules elementarily equivalent to a Σ-cotorsion module are again Σ-cotorsion. Moreover, we describe the structure of Σ-cotorsion modules.
specify causeModel hypothesis observable observationModel sigma symptom sigma Balder et. al.: Building Formal KADS-II Models Figure 3: Menufor an item in a layer. band animation, connect modules. TheME generates the appropriate formal statements; • removing, modules can be removed, but only in those cases where no other modules depend on them; • renaming, if the name of a module is changed all ...
Let Uq denote the quantum group associated with a finite dimensional semisimple Lie algebra. Assume that q is a complex root of unity of odd order and that Uq is obtained via Lusztig’s q-divided powers construction. We prove that all regular projective (tilting) modules for Uq are rigid, i.e., have identical radical and socle filtrations. Moreover, we obtain the same for a large class of Weyl m...
Purpose: In recent years, although several studies have focused on Lean Six Sigma project selection, none of them have applied a Lean Six Sigma approach to evaluate e-health reference architectures. Therefore, there is a significant gap of Lean Six Sigma application for e-Health architectures in e-Health care quality improvement literature. In this paper, we present a Lean Six Sigma approach to...
We provide polynomial time algorithms for deciding equation solvability and identity checking over groups that are semidirect products of two nite Abelian groups. Our main method is to reduce these problems to the sigma equation solvability and sigma equivalence problems over modules for commutative unital rings.
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