On the hereditary -Buchsbaum property for ideals and .
Benjamin, E., Bresinsky, H. (2004)
Acta Mathematica Universitatis Comenianae. New Series
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Benjamin, E., Bresinsky, H. (2004)
Acta Mathematica Universitatis Comenianae. New Series
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Károly Simon, Boris Solomyak (1998)
Fundamenta Mathematicae
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We prove a classification theorem of the “Glimm-Effros” type for Borel order relations: a Borel partial order on the reals either is Borel linearizable or includes a copy of a certain Borel partial order which is not Borel linearizable.
F. Azarpanah, O. Karamzadeh, A. Rezai Aliabad (1999)
Fundamenta Mathematicae
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An ideal I in a commutative ring R is called a z°-ideal if I consists of zero divisors and for each a ∈ I the intersection of all minimal prime ideals containing a is contained in I. We characterize topological spaces X for which z-ideals and z°-ideals coincide in , or equivalently, the sum of any two ideals consisting entirely of zero divisors consists entirely of zero divisors. Basically disconnected spaces, extremally disconnected and P-spaces are characterized in terms of z°-ideals....
Kevin Hutchinson (1995)
Acta Arithmetica
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0. Introduction. Since ℤ is a principal ideal domain, every finitely generated torsion-free ℤ-module has a finite ℤ-basis; in particular, any fractional ideal in a number field has an "integral basis". However, if K is an arbitrary number field the ring of integers, A, of K is a Dedekind domain but not necessarily a principal ideal domain. If L/K is a finite extension of number fields, then the fractional ideals of L are finitely generated and torsion-free (or, equivalently, finitely...
Borodin, O.V., Ivanova, A.O., Neustroeva, T.K. (2004)
Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]
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Mironova, Yu.N. (2002)
Sibirskij Matematicheskij Zhurnal
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Hourong Qin (1995)
Acta Arithmetica
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Vinokurov, N.S. (2006)
Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]
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Ireneusz Recław, Piotr Zakrzewski (1999)
Fundamenta Mathematicae
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Let I and J be σ-ideals on Polish spaces X and Y, respectively. We say that the pair ⟨I,J⟩ has the Strong Fubini Property (SFP) if for every set D ⊆ X× Y with measurable sections, if all its sections are in J, then the sections are in I for every y outside a set from J (“measurable" means being a member of the σ-algebra of Borel sets modulo sets from the respective σ-ideal). We study the question of which pairs of σ-ideals have the Strong Fubini Property. Since CH excludes this...
J. C. Wilson (1994)
Acta Arithmetica
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Čomić, Irena, Stojanov, Jelena, Grujić, Gabrijela (2008)
Novi Sad Journal of Mathematics
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Dinariev, O.Yu. (2000)
Siberian Mathematical Journal
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Makoto Ishibashi (1995)
Acta Arithmetica
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(1994)
Acta Arithmetica
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