Results 11 to 20 of about 6,125,058 (320)

Topological frame extension [PDF]

open access: yes, 2013
The concept of nearness on a set was introduced by H. Herrlich. D. Le- seberg generalized nearness by introducing supernearness, which generalizes also supertopology as de ned by D. Doitchinov.
Leseberg , Dieter, Vaziry, Zohref
core   +1 more source

Extension of Lorenz Unpredictability [PDF]

open access: yes, 2015
It is found that Lorenz systems can be unidirectionally coupled such that the chaos expands from the drive system. This is true if the response system is not chaotic, but admits a global attractor, an equilibrium or a cycle.
Akhmet M. U.   +13 more
core   +2 more sources

On Extension Of Functors [PDF]

open access: yes, 2011
A.Chigogidze defined for each normal functor on the category Comp an extension which is a normal functor on the category Tych. We consider this extension for any functor on the category Comp and investigate which properties it preserves from the ...
Karchevska, Lesya, Radul, Taras
core   +2 more sources

Extension Groups for DG Modules [PDF]

open access: yes, 2016
Let $M$ and $N$ be differential graded (DG) modules over a positively graded commutative DG algebra $A$. We show that the Ext-groups $\operatorname{Ext}^i_A(M,N)$ defined in terms of semi-projective resolutions are not in general isomorphic to the Yoneda
Nasseh, Saeed, Sather-Wagstaff, Sean
core   +3 more sources

To work alone or with peers: Exploring smallholder coffee farmers’ perceptions influencing collective actions

open access: yesAdvancements in Agricultural Development, 2021
This study explores how smallholder coffee farmers’ perceptions may influence their engagement in peer mobilization and collective action. Forty smallholder coffee farmers were interviewed in the Central Highlands region of Peru using a closed-ended ...
Colby Silvert   +3 more
doaj   +1 more source

Crossed Extensions [PDF]

open access: yesTransactions of the American Mathematical Society, 1980
We develop a natural five term exact sequence relating the second and third cohomology of groups. We show that this sequence is the proper framework for the problem of realizing an abstract kernel. As an application, we give an interpretation of the third cohomology of a group in terms of crossed sequences.
openaire   +2 more sources

Aspects of the Stueckelberg Extension [PDF]

open access: yes, 2005
A detailed analysis of a Stueckelberg extension of the electro-weak gauge group with an extra U(1) factor is presented for the Standard Model as well as for the MSSM.
Kors, Boris, Nath, Pran
core   +3 more sources

Multipoint normal differential operators of first order [PDF]

open access: yesOpuscula Mathematica, 2009
In this paper we discuss all normal extensions of a minimal operator generated by a linear multipoint differential-operator expression of first order in the Hilbert space of vector-functions on the finite interval in terms of boundary and interior point ...
Zameddin I. Ismailov
doaj   +1 more source

Simple Extensions

open access: yesFormalized Mathematics, 2023
Summary In this article we continue the formalization of field theory in Mizar. We introduce simple extensions: an extension E of F is simple if E is generated over F by a single element of E, that is E = F (a) for some a ∈ E. First, we prove that a finite extension E of F is simple if and only if there are only finitely many ...
Christoph Schwarzweller   +1 more
openaire   +3 more sources

Recent changes in rice production in rainfed lowland and irrigated ecosystems in Thailand

open access: yesPlant Production Science, 2021
While Thailand is a major rice exporting country in the world, the yield is low among Asian countries. In order to identify factors determining the changes in rice productivity in the country for the last 45 years (1974–2018), various data on production ...
Pichayanun Suwanmontri   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy