نتایج جستجو برای: weakly reversible rings
تعداد نتایج: 144213 فیلتر نتایج به سال:
When natural degradation processes are slow and technological cleanup methods ineffective, plastic pollution is considered "poorly reversible" in that particular ecosystem. In areas where has had a harmful impact, it may be nearly impossible to reverse the damage. Weakly reversible can result changes carbon nitrogen cycles, alterations soil habitat, sedimentation, effects on aquatic ecosystems ...
In this work we extend results introduced in [15]. Especially, we solve the reversibility problem for DNA codes over the non chain ring Rk,s = F42k [u1, . . . , us]/〈u 2 1 − u1, . . . , u 2 s − us〉. We define an automorphism θ over Rk,s which helps us both finding the idempotent decomposition of Rk,s and solving the reversibility problem via skew cyclic codes. Moreover, we introduce a generaliz...
A skew Laurent polynomial ring S = R[x;α] is reversible if it has a reversing automorphism, that is, an automorphism θ of period 2 that transposes x and x and restricts to an automorphism γ of R with γ = γ. We study invariants for reversing automorphisms and apply our methods to determine the rings of invariants of reversing automorphisms of the two most familiar examples of simple skew Laurent...
We associate to every equicharacteristic zero Noetherian local ring R a faithfully flat ring extension which is an ultraproduct of rings of various prime characteristics, in a weakly functorial way. Since such ultraproducts carry naturally a non-standard Frobenius, we can define a new tight closure operation on R by mimicking the positive characteristic functional definition of tight closure. T...
In this paper we present analytic formulas to estimaie the vertical emittance in weakly coupled electron/positron storage rings. We consider contributions from both the vertical dispersion and linear coupling of the betatron motions. In addition to simple expressions for random misalignments and rotations of the magnets, formulas are presented to calculate the vertical emittance ,blowup due to ...
The ability to assemble weakly interacting subsystems is a prerequisite for implementing quantum information processing and generating controlled entanglement. In recent years, molecular nanomagnets have been proposed as suitable candidates for qubit encoding and manipulation. In particular, antiferromagnetic Cr7Ni rings behave as effective spin-1/2 systems at low temperature and show long deco...
We study the algebraic and arithmetic structure of monoids invertible ideals (more precisely, $r$-invertible $r$-ideals for certain ideal systems $r$) Krull weakly Mori domains. also investigate all nonzero polynomial rings with at least two indeterminates over noetherian Among others, we show that they are not transfer but share several arithmetical phenomena having infinite class group prime ...
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