Results 51 to 60 of about 76,584 (187)

On symplectic coverings of the projective plane [PDF]

open access: yesIzvestiya: Mathematics, 2005
42 ...
Greuel, G. -M., Kulikov, Vik. S.
openaire   +2 more sources

On the validation of spatial statistical vegetation models

open access: yesBIO Web of Conferences, 2019
The features of coefficients of determination and coefficients of leave-one-out method for spatial vegetation model and spatial models of squared deviations are discussed. The properties of models are illustrated in key area for spatial model of Cladonia
Makhatkov Igor
doaj   +1 more source

Hodge theory of cyclic covers branched over a union of hyperplanes

open access: yes, 2013
Suppose that Y is a cyclic cover of projective space branched over a hyperplane arrangement D, and that U is the complement of the ramification locus in Y.
Arapura   +13 more
core   +1 more source

Some Characterized Projective δ-cover [PDF]

open access: yes, 2015
In this paper we characterize some properties of projective #948-cover and find some new results with #948-supplemented module M. Let M be a fixed R-module. A #948-cover in M is an #948-small epimorphism from M onto P. These concept introduce by Zhou [14]
Wadbude, R. S. (R)
core  

Post-pyrogenic changes in vegetation cover and biological soil crust in steppe ecosystems

open access: yesRegulatory Mechanisms in Biosystems, 2017
The study of the processes of restoration of species richness and productivity of steppe ecosystems after fires is an urgent problem that affects not only the conservation of biodiversity but also the maintenance of pasture resources.
V. V. Shcherbyna   +3 more
doaj   +1 more source

K3 surfaces with $\mathbb{Z}_2^2$ symplectic action

open access: yes, 2018
Let $G$ be a finite abelian group which acts symplectically on a K3 surface. The N\'eron-Severi lattice of the projective K3 surfaces admitting $G$ symplectic action and with minimal Picard number is computed by Garbagnati and Sarti.
Schaffler, Luca
core   +1 more source

Infinite Noncommutative Covering Projections

open access: yes, 2014
51 pages, 34 references. arXiv admin note: text overlap with arXiv:hep-th/9904001, arXiv:1107.3458, arXiv:math/0608572 by other authors.
openaire   +2 more sources

Enlargement of Symmetry Groups in Physics: A Practitioner’s Guide

open access: yesUniverse
Wigner’s classification has led to the insight that projective unitary representations play a prominent role in quantum mechanics. The physics literature often states that the theory of projective unitary representations can be reduced to the theory of ...
Lehel Csillag   +2 more
doaj   +1 more source

n- Refined Neutrosophic of Fine Module With Some Applications [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة
: In this paper, we study and present an important concept in module theory which namely neutrosophic fine module. Fine property for modules and rings. We denote ( - module) to Fine module.
Muntaha AL-Fahdawi, Majid Al-Shujairy
doaj   +1 more source

ASSESSMENT OF VEGETATION COVER FORMATION IN RECULTIVATION TERRITORIES OF ASH AND SLAG DUMPS IN CHITA THERMAL POWER PLANT № 1

open access: yesНаучный журнал Российского НИИ проблем мелиорации, 2020
The purpose of this study was to assess the restoration of vegetation in the reclaimed bowls of the ash dumps of the Chita TPP-1. The object of the research was the vegetation cover formed on two worked-out cups of the ash dumps, which were reclaimed in ...
T. V. Zhelibo   +2 more
doaj   +1 more source

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