نتایج جستجو برای: central extension
تعداد نتایج: 611760 فیلتر نتایج به سال:
We consider the inclusion of brane charges in AdS5 superalgebras that contain the maximal central extension of the super-Poincaré algebra on ∂AdS5. For theories with N supersymmetries on the boundary, the maximal extension isOSp(1/8N,R), which contains the group Sp(8N,R) ⊃ U(2N, 2N) ⊃ SU(2, 2)× U(N) as extension of the conformal group. An “intermediate” extension to U(2N, 2N/1) is also discusse...
This paper focuses on the following two questions relating to the inverse Galois problem: (1) (Beckmann [2]) Is every finite Galois extension of Q the specialization of a Galois branched covering of P defined over Q and with the same Galois group? (2) (Birch [3]) Given a finite group G, is there a tamely ramified normal extension F/Q with Gal(F/Q) ∼ = G? We obtain affirmative answers to these q...
We consider the inclusion of brane charges in AdS5 superalgebras that contain the maximal central extension of the super-Poincaré algebra on ∂AdS5. For theories with N supersymmetries on the boundary, the maximal extension is OSp(1/8N), which contains the group Sp(8N,R) ⊃ U(2N, 2N) ⊃ SU(2, 2)× U(N) as extension of the conformal group. An “intermediate” extension to U(2N, 2N/1) is also discussed...
Introduction Agricultural development is critical to the reconstruction of Afghanistan. Central to rebuilding the agriculture sector is the need for an effective agriculture research and extension system. Throughout the world, and in Afghanistan, agriculture research and extension is in transition – influenced by trends toward reduced government intervention in the economy, growth of the privat...
Agricultural extension services have been playing a central role in transformation process of agricultural sector in Nigeria but there are challenges which affect the quality of service delivery especially increasing cost of services and poor funding and therefore, promoting emergence of new extension strategies offered by private sector . The study investigated the perception of maize crop far...
OBJECTIVE The aim of this study was to classify the types of tumor extension and spread of small cell lung carcinoma (SCLC) and to recognize the unusual types of spread pattern of SCLC on computed tomography (CT) including multidetector row CT (MDCT) using contrast-enhanced material. MATERIALS AND METHODS Sixty-eight cases (53 men and 15 women aged 54-83 years old) of pathologically proven SC...
Assembling a large genome using next generation sequencing reads requires large computer memory and a long execution time. To reduce these requirements, we propose an extension-based assembler, called JR-Assembler, where J and R stand for "jumping" extension and read "remapping." First, it uses the read count to select good quality reads as seeds. Second, it extends each seed by a whole-read ex...
An extension of a group A by a group G is thought of here simply as a group H containing A as a normal subgroup with quotient H/A isomorphic to G. It is called a central Frattini extension if A is contained in the intersection of the centre and the Frattini subgroup of H . The result of the paper is that, given a finite abelian A and finite G, there exists a central Frattini extension of A by G...
PURPOSE We evaluated whether the clinicopathological factors of papillary thyroid microcarcinoma (PTMC), especially tumoe size, are associated with subcinical central lymph node metastasis. MATERIALS AND METHODS A total of 160 patients diagnosed with PTMC who underwent total thyroidectomy with bilateral central lymph node dissection were enrolled in this study. All patients were clinically ly...
We construct a family of representations central extension loop group and affine Lie algebra for $\frak {sl}_n$ study their relations with highest weight modules. also Whittaker functionals on our prepresentations.
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