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Open AccessSpectra of Groups
The aim of this paper is to investigate the behaviour of prime and semiprime subgroups of groups, and their relation with the existence of abelian normal subgroups. In particular, we study the set Spec(G) of all ...
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Article
Open AccessFree Covers and Minimal Sets of Generators
We continue our study of the relation between existence of projective covers and existence of minimal sets of generators for right modules over an arbitrary ring.
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Article
Open AccessProjective covers over local rings
We describe the structure of the projective cover of a module \(M_R\) M ...
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Article
Pretorsion theories, stable category and preordered sets
We show that in the category of preordered sets there is a natural notion of pretorsion theory, in which the partially ordered sets are the torsion-free objects and the sets endowed with an equivalence relatio...
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Article
Correction to: “Familial venoms”: a thallium intoxication cluster
The original version of this article unfortunately contained a mistake. The presentation of Table 1 was incorrect. The corrected Table 1 is given below.
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Article
Refractory Intracranial Hypertension in Posterior Reversible Encephalopathy Syndrome
Posterior reversible encephalopathy syndrome (PRES) is a largely reversible disease with long-term favorable outcome. A minority of patients, however, may develop progressive cerebral edema and ischemia result...
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Article
Open AccessDirect-sum decompositions of modules with semilocal endomorphism rings
According to the classical Krull–Schmidt Theorem, any module of finite composition length decomposes as a direct sum of indecomposable modules in an essentially unique way, that is, unique up to isomorphism of...
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Article
Divisible modules and space of divisibility of an integral domain
Se A è un modulo divisibile su un dominio d'integrità R e Q è il campo delle frazioni di R, sia RA⊂ Q il massimo sopraanello di R tale che A possa essere dotato della struttura di RA-modulo. La struttura di RA ri...
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Loewy and Artinian modules over commutative rings
Si dimostra che se M è un modulo Artiniano con zoccolo semplice su un anello commutativo R, allora EndR(M) è commutativo locale Noetheriano completo e che M, come EndR (M)-modulo, è l'inviluppo iniettivo dell'uni...
