Results 21 to 30 of about 816 (251)
ORBIFOLD GROUPS, QUASI-PROJECTIVITY AND COVERS [PDF]
Journal of Singularities, 2012 20 ...
Bartolo, Enrique Artal +2 more
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Flat covers of representations of the quiver A∞
International Journal of Mathematics and Mathematical Sciences, 2003 Rooted quivers are quivers that do not contain A∞≡⋯→•→• as a subquiver. The existence of flat covers and cotorsion envelopes for representations of these quivers have been studied by Enochs et al.
E. Enochs +3 more
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Quasi-projective covers of right $S$-acts [PDF]
Categories and General Algebraic Structures with Applications, 2014 In this paper $S$ is a monoid with a left zero and $A_S$ (or $A$) is a unitary right $S$-act. It is shown that a monoid $S$ is right perfect (semiperfect) if and only if every (finitely generated) strongly flat right $S$-act is quasi-projective.
Mohammad Roueentan, Majid Ershad
doaj
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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DYNAMICS OF ILLUMINANCE INCIDENT ON THE LANW SURFACE IN THE SHADE OF VARIOUS WOODY SPECIES
Юг России: экология, развитие, 2019 Aim. This paper is aimed at studying the relative light conditions (RLC) for lawns in the crown shade of light‐requiring and shade‐tolerant trees from the landscaping sites of Stavropol.Methods.
L. A. Grechushkina‐Sukhorukova
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Categorical Properties of Soft Sets
The Scientific World Journal, 2014 The present study investigates some novel categorical properties of soft sets. By combining categorical theory with soft set theory, a categorical framework of soft set theory is established.
Min Zhou, Shenggang Li, Muhammad Akram
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ORTHORECTIFICATION BY USING GPGPU METHOD [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012 Thanks to the nature of the graphics processing, the newly released products offer highly parallel processing units with high-memory bandwidth and computational power of more than teraflops per second.
H. Sahin, S. Kulur
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Classes of modules closed under projective covers
Open MathematicsIn this work, we study some classes of modules closed under submodules, quotients, and projective covers, even if the left projective cover of an arbitrary left module not always exists. We obtain a characterization of artinian principal ideal rings when
Cejudo-Castilla César +2 more
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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
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Nurses are central to cancer care for children and adolescents, yet no comprehensive synthesis has defined essential core competencies for pediatric oncology nursing (PON) practice internationally, particularly in Latin America and the Caribbean (LAC).
Luís Carlos Lopes‐Júnior +7 more
wiley +1 more source