Results 61 to 70 of about 76,584 (187)
Uniformisation in dimension four: towards a conjecture of Iitaka [PDF]
, 2016 Let X be a compact K\"ahler manifold whose universal covering is $\mathbb C^n$. A conjecture of Iitaka claims that X is a torus, up to finite \'etale cover. We prove this conjecture in various cases in dimension four.
Höring, Andreas +2 more
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Новые технологииDefinition of the ceno-flora or regional flora in the cenosis, the proportion of species resistant or non-resistant to impacts has become widespread among the methods of indicating disturbances in vegetation cover.However, such studies, if they are ...
V. V. Akatov +2 more
doaj +1 more source
Epis and monos which must be isos
International Journal of Mathematics and Mathematical Sciences, 1984 Orzech [1] has shown that every surjective endomorphism of a noetherian module is an isomorphism. Here we prove analogous results for injective endomorphisms of noetherian injective modules, and the duals of these results.
David J. Fieldhouse
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Density of scots pine seedlings in pine forests under the influence of emissions from the Karabash copper smelter and forest fi res [PDF]
Известия Саратовского университета. Новая серия: Серия Химия. Биология. ЭкологияWe assessed the features of natural pine regeneration in forests with diff erent ages of ground fi res in the Southern Urals depending on the level of heavy metal pollution.
Kuyantseva, Nadezhda Borisovna +3 more
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Injective Envelopes and Projective Covers of Quivers [PDF]
The Electronic Journal of Combinatorics, 2012 This paper characterizes the injective and projective objects in the category of directed multigraphs, or quivers. Further, the injective envelope and projective cover of any quiver in this category is constructed.
openaire +3 more sources
Codivisible modules, weakly-codivisible modules and strongly η-projevtive modules [PDF]
, 1980 In [1], P.E. Bland has studied the strongly M-projective module and the strongly M-projective cover. As their general notions, we define the strongly n-projective modle and the strongly n-projective cover for any class ..
Sato Masahisa
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Influence of Fires on Desert Plant Communities at the Chernye Zemli (SW Russia)
FireUnderstanding the rate and direction of pyrogenic succession in arid ecosystems, which depends on many factors, including the intensity of grazing and the frequency of pyrogenic expo-sure, will allow for more accurate predictions of the consequences of ...
Galya V. Klink +10 more
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Development of methods for express-evaluation of resources of Hypericum perforatum L.
Біологічні студії, 2013 The results of development of the model of resource evaluation of Hypericum perforatum L. in the field, based on statistical analysis of raw-material-relevant characteristics of populations of this species, including multivariate regression analysis, are
V. M. Minarchenko
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Influence of recreation on radial growth of the common pine tree [PDF]
Известия Саратовского университета. Новая серия: Серия Химия. Биология. ЭкологияThe article deals with the stages of recreational digression of diff erent biogeocenoses in the Shirokovsky district forestry of the National Park “Buzuluksky Bor” and the peculiarities of radial growth of the common pine as a dominant stand.
Simonenkov, Vladislav S. +4 more
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