10,514 research outputs found
A Zariski Topology for Modules
Given a duo module over an associative (not necessarily commutative) ring
a Zariski topology is defined on the spectrum
of {\it fully prime} -submodules of . We
investigate, in particular, the interplay between the properties of this space
and the algebraic properties of the module under consideration.Comment: 22 pages; submitte
Exact Sequences of Semimodules over Semirings
In this paper, we introduce and investigate a new notion of exact sequences
of semimodules over semirings relative to the canonical image factorization.
Several homological results are proved using the new notion of exactness
including some restricted versions of the Short Five Lemma and the Snake Lemma
opening the door for introducing and investigating homology objects in such
categories. Our results apply in particular to the variety of commutative
monoids extending results in homological varieties.Comment: arXiv admin note: substantial text overlap with arXiv:1111.033
Cosmological Analysis of Pilgrim Dark Energy in Loop Quantum Cosmology
The proposal of pilgrim dark energy is based on speculation that phantom-like
dark energy (with strong enough resistive force) can prevent black hole
formation in the universe. We explore this phenomenon in loop quantum cosmology
framework by taking Hubble horizon as an infra-red cutoff in pilgrim dark
energy. We evaluate the cosmological parameters such as Hubble, equation of
state parameter, squared speed of sound and also cosmological planes like
and on the basis of pilgrim dark
energy parameter () and interacting parameter (). It is found that
values of Hubble parameter lies in the range . It is
mentioned here that equation state parameter lies within the ranges
for and for ,
respectively. Also, planes provide
CDM limit, freezing and thawing regions for all cases of . It is
also interesting to mention here that
planes lie in the range (). In addition, planes also corresponds to
CDM for all cases of . Finally, it is remarked that all the above
constraints of cosmological parameters shows consistency with different
observational data like Planck, WP, BAO, and SNLS.Comment: 22 pages, 20 Figure
Duality Theorems for Crossed Products over Rings
In this note we extend duality theorems for crossed products obtained by M.
Koppinen and C. Chen from the case of a base field or a Dedekind domain to the
case of an arbitrary noetherian commutative ground ring under fairly weak
conditions. In particular we extend an improved version of the celebrated
Blattner-Montgomery duality theorem to the case of arbitrary noetherian ground
rings.Comment: 24 page
On the Linear Weak Topology and Dual Pairings over Rings
In this note we study the weak topology on paired modules over a (not
necessarily commutative) ground ring. Over QF rings we are able to recover most
of the well known properties of this topology in the case of commutative base
fields. The properties of the linear weak topology and the dense pairings are
then used to characterize pairings satisfying the so called -condition.Comment: 16 pages, to appear in "Topologu and its Applications
- β¦