Results 31 to 40 of about 76,584 (187)
Split abelian chief factors and first degree cohomology for Lie algebras [PDF]
, 2013 In this paper we investigate the relation between the multiplicities of split abelian chief factors of finite-dimensional Lie algebras and first degree cohomology.
Feldvoss, Jörg +2 more
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On covers of cyclic acts over monoids
, 2008 In (Bull. Lond. Math. Soc. 33:385–390, 2001) Bican, Bashir and Enochs finally solved a long standing conjecture in module theory that all modules over a unitary ring have a flat cover.
B. Stenström +14 more
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Quadric surface bundles over surfaces and stable rationality
, 2018 We prove a general specialization theorem which implies stable irrationality for a wide class of quadric surface bundles over rational surfaces. As an application, we solve with the exception of two cases, the stable rationality problem for any very ...
Schreieder, Stefan
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Quasi-Projective Covers and Direct Sums [PDF]
Proceedings of the American Mathematical Society, 1970 In this paper R R denotes an associative ring with an identity, and all modules are unital left R R -modules. It is shown that the existence of a quasi-projective cover for each module implies that each module has a projective cover. By a similar technique the following statements are shown to be equivalent: 1.
openaire +2 more sources
Impact of weed infestation on projective soil cover changes during the sunflower vegetation period
Людина і довкілля: Проблеми неоекологіїWeed infestation is one of the key factors influencing the formation of plant cover in agroecosystems. In the context of sunflower cultivation, projective soil cover varies depending on the intensity of weed competition, especially during critical ...
M. V. Shevchenko, A. V. Olenchenko
doaj +1 more source
Kaitan Antara Suplemen Suatu Modul Dan Eksistensi Amplop Proyektif Modul Faktornya Dalam Kategori [M] [PDF]
, 2011 Let M be an R-module and N Î s[M]. A projective module P with a superfluous epimorphism p : P ® N is called projective cover of N in s[M]. Even if there are enough projective module in s[M], a module need not have a projective cover.
Fitriani, F. (Fitriani)
core
Projections of random covering sets [PDF]
Journal of Fractal Geometry, Mathematics of Fractals and Related Topics, 2015 We show that, almost surely, the Hausdor dimension s0 of a random covering set is preserved under all orthogonal projections to linear subspaces with dimension k > s_0 . The result holds for random covering sets with a generating sequence of ball-
Chen, Changhao +3 more
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Semi-perfect and F-semi-perfect modules
International Journal of Mathematics and Mathematical Sciences, 1985 A module is semi-perfect iff every factor module has a projective cover. A module M=A+B (for submodules A and B) is amply supplemented iff there exists a submodule A′ (called a supplement of A) of B such M=A+A′ and A′ is minimal with this property.
David J. Fieldhouse
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δss-supplemented modules and rings
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2020 In this paper, we introduce the concept of δss-supplemented modules and provide the various properties of these modules. In particular, we prove that a ring R is δss-supplemented as a left module if and only if RSoc(RR){R \over {Soc\left( {_RR} \right)}}
Türkmen Burcu Nişancı +1 more
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Quantization of symplectic tori in a real polarization
, 1996 We apply the geometric quantization method with real polarizations to the quantization of a symplectic torus. By quantizing with half-densities we canonically associate to the symplectic torus a projective Hilbert space and prove that the projective ...
Manoliu, Mihaela
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