Results 11 to 20 of about 1,871 (258)
Projective covers over local rings [PDF]
Annali di Matematica Pura ed Applicata (1923 -), 2021 AbstractWe describe the structure of the projective cover of a module $$M_R$$ M R over a local ring R and its relation with minimal sets of generators of $$M_R$$ M R
Ercolanoni S., Facchini A.
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A generalization of projective covers
Journal of Algebra, 2008 The authors generalize the notion of a projective cover of a module to the projective \(I\)-cover of a module for an ideal \(I\) of a ring \(R\). They prove that a ring \(R\) is \(I\)-semiregular if and only if every cyclically presented \(R\)-module has a projective \(I\)-cover.
Alkan, Mustafa +2 more
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Remote Sensing, 2016 Tree cover maps are used for many purposes, such as vegetation mapping, habitat connectivity and fragmentation studies. Small remnant patches of native vegetation are recognised as ecologically important, yet they are underestimated in remote sensing ...
Adrian Fisher +5 more
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Semihollow-Lifting Modules and Projectivity
مجلة بغداد للعلوم, 2022 Throughout this paper, T is a ring with identity and F is a unitary left module over T. This paper study the relation between semihollow-lifting modules and semiprojective covers. proposition 5 shows that If T is semihollow-lifting, then every semilocal
Anfal Hasan Dheyab +2 more
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Известия ТИНРО, 2020 Dominant species are identified at infracenotic level for aquatic vegetation in the sublittoral zone of the northwestern Tatar Strait (Japan Sea) on the data collected in 2010–2019.
A. A. Dulenin
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Peculiarities of the weed infestation of young paulownia (Paulownia tomentosa L.) stands
Карантин і захист рослин, 2023 Goal. To study the weeding processes of young Paulownia tomentosa (Paulownia tomentosa L.) plantations for the further development of an effective weed protection system in the conditions of the Forest Steppe of Ukraine. Methods.
H. Nychkaliuk
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The condition of the epiphytic lichens of dark coniferous forest in the area of the outbreak of ips sexdentatus boern on the Maly Abakan site of Khakassky nature reserve [PDF]
BIO Web of Conferences, 2021 The study presents data on the condition of the thalli of epiphytic lichens, their occurrence and projective cover on the sample plots located in the area of the outbreak of Ips sexdentatus Boern on the Maly Abakan site of Khakassky Nature Reserve.
Larina Оlga, Макееva Еvgenia
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Ecological aspect of the soil mechanical resistance in the oak forest of the steep bank
Vìsnik Dnìpropetrovsʹkogo Unìversitetu: Serìâ Bìologìâ, Ekologìâ, 2010 The obtained data revealed that soil mechanical resistance is an important factor affected many essential ecological properties of the biogeocoenosis.
O. М. Kunah, A. A. Baldin
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Modern Technologies and Scientific and Technological Progress, 2020 The actual problems, being of world importance: environmental protection, planet pollution, charity are considered.
Alena Boycova, Nadezhda Grin
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Epigeic bryophytes of Bryansk parks and prospects for their use in landscape architecture [PDF]
E3S Web of ConferencesStudies of epigeal bryophytes growing on the territory of public facilities in Bryansk have been carried out and the prospects of using mossy ones for the landscape organization of an urbanized environment have been considered. The studies were conducted
Adamovich Igor +6 more
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