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15 results on '"Chu, Yan-Jun"'

2. A Vertex Algebra Commutant for the $\beta\gamma$-System and Howe pairs

Author

Chu, Yan-Jun, Huang, Fang, and Zheng, Zhu-Jun

Subjects
Mathematics - Quantum Algebra, Mathematical Physics, 17B69, 81T40
Abstract

Analogue to commutants in the theory of associative algebras, one can construct a new subalgebra of vertex algebra known as a vertex algebra commutant. In this paper, for the adjoint representation $V$ of Lie algebra $sl(2,\C)$, we describe a commutant of $\beta\gamma$- System $S(V)$ by giving its generators, moreover, we get a new Howe pair of vertex algebras., Comment: 15 pages, No figures. This is our first paper of series on this topic

Published
2009

3. Vertex Operator Algebra Analogue of Embedding $D_8$ into $E_8$

Author

Chu, Yan-Jun and Zheng, Zhu-Jun

Subjects
Mathematics - Quantum Algebra, High Energy Physics - Theory, Mathematics - Representation Theory, 17B69, 81T40
Abstract

Let $L_{D_8}(1, 0)$ and $L_{E_8}(1, 0)$ be the simple vertex operator algebras associated to untwisted affine Lie algebra $\widehat{{\mathbf g}}_{D_{8}}$ and $\widehat{{\mathbf g}}_{E_8}$ with level 1 respectively. In the 1980s by I. Frenkel, Lepowsky and Meurman as one of the many important preliminary steps toward their construction of the moonshine module vertex operator algebra, they use roots lattice showing that $L_{D_8}(1, 0)$ can embed into $L_{E_8}(1, 0)$ as a vertex operator subalgebra(\cite{5, 6, 8}). Their construct is a base of vertex operator theory. But the embedding they gave using the fact $L_{\mathbf g}(1,0)$ is isomorphic to its root lattice vertex operator algebra $V_L$. In this paper, we give an explicitly construction of the embedding and show that as an $L_{D_8}(1, 0)$-module, $L_{E_8}(1, 0)$ is isomorphic to the extension of $L_{D_8}(1, 0)$ by its simple module $L_{D_8}(1, \overline{\omega}_8)$. It may be convenient to be used for conformal field theory., Comment: The abstrat and section 1 are modified. We give more informations about the embedding

Published
2008

6. Realization of Vertex Operators of 7-Twisted Affine Lie Algebra

Author

Chu Yan-Jun, Dong Wen-Feng, and Zheng Zhu-Jun

Subjects
Filtered algebra, Quantum affine algebra, Pure mathematics, Physics and Astronomy (miscellaneous), Vertex operator algebra, Current algebra, Universal enveloping algebra, Affine Lie algebra, Mathematics, Lie conformal algebra, Graded Lie algebra
Abstract

In this paper, we construct a new algebra structure 7-twisted affine Lie algebra and study its vertex operator representations.

Published
2010

13. A commutant of βγ-system associated to the highest weight module V4 of sl(2,C).

Author

Chu, Yan-Jun, Huang, Fang, and Zheng, Zhu-Jun

Subjects
*ASSOCIATIVE algebras, *LIE algebras, *GEOMETRICAL constructions, *MODULES (Algebra), *SET theory, *OPERATOR theory, *HOMOMORPHISMS
Abstract

Analogous to the commutant in the theory of associative algebras, one can construct a new subalgebra of a vertex algebra, known as the vertex algebra commutant. In this paper, for the highest weight module V4 of Lie algebra sl(2,C), we describe a commutant of βγ-system S(V4) by giving a finite set of generators and operator product expansion relations among generators. [ABSTRACT FROM AUTHOR]

Published
2010
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14. Efficacy of tandospirone in patients with irritable bowel syndrome-diarrhea and anxiety.

Author

Lan L, Chen YL, Zhang H, Jia BL, Chu YJ, Wang J, Tang SX, and Xia GD

Subjects
Abdominal Pain drug therapy, Abdominal Pain etiology, Adult, Aged, Anti-Anxiety Agents administration & dosage, Anti-Anxiety Agents adverse effects, Anxiety diagnosis, Anxiety etiology, Anxiety psychology, Calcium Channel Blockers therapeutic use, China, Diarrhea diagnosis, Diarrhea etiology, Drug Administration Schedule, Female, Humans, Irritable Bowel Syndrome complications, Irritable Bowel Syndrome diagnosis, Irritable Bowel Syndrome psychology, Isoindoles administration & dosage, Isoindoles adverse effects, Male, Middle Aged, Morpholines therapeutic use, Pain Measurement, Piperazines administration & dosage, Piperazines adverse effects, Prospective Studies, Pyrimidines administration & dosage, Pyrimidines adverse effects, Single-Blind Method, Surveys and Questionnaires, Time Factors, Treatment Outcome, Young Adult, Anti-Anxiety Agents therapeutic use, Anxiety drug therapy, Diarrhea drug therapy, Irritable Bowel Syndrome drug therapy, Isoindoles therapeutic use, Piperazines therapeutic use, Pyrimidines therapeutic use
Abstract

Aim: To investigate the efficacy of tandospirone in patients with irritable bowel syndrome-diarrhea (IBS-D) and anxiety in a prospective, randomized, controlled study., Methods: Two hundred patients with IBS-D and moderate anxiety were randomized to receive pinaverium and tandospirone (arm A) or pinaverium and placebo (arm B). Tandospirone or placebo was given thrice daily at a fixed dose of 10 mg and pinaverium was given thrice daily at a fixed dose of 50 mg. The duration of treatment was 8 wk. Patients were assessed for abdominal pain and diarrhea. Anxiety was evaluated using the Hamilton Rating Scale for Anxiety (HAM-A). The primary study endpoints were response rates for abdominal pain and diarrhea. The secondary study endpoints were response rates for anxiety. Adverse events were also evaluated., Results: One hundred and seventy of 200 patients (82 patients in arm A and 88 patients in arm B) completed the study. Demographic and baseline characteristics of the 200 participants were comparable in the two arms. At week 8, the overall response rate for abdominal pain and diarrhea was 52.0% for arm A and 37.0% for arm B (P < 0.05). The HAM-A score showed that the response rate was 61.0% for arm A and 21.0% for arm B (P < 0.01). The treatments were well tolerated and no significant adverse events were reported., Conclusion: Tandospirone is effective and can be combined with pinaverium in IBS-D patients with anxiety.

Published
2014
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15. [Cutis verticis gyrata].

Author

Wang MG, Chu YJ, Shui QF, Du XY, Yu G, Wang HY, and Wang K

Subjects
Adolescent, Adult, Female, Humans, Male, Middle Aged, Tissue Expansion methods, Young Adult, Scalp abnormalities, Scalp Dermatoses pathology, Scalp Dermatoses surgery
Abstract

Objective: To improve the recognition and treatment of Chinese cutis verticis gyrata., Methods: Based on the review of the etiopathology, clinical features, diagnosis, classification and treatment of the disease in the literatures, six patients with the cutis verticis gyrata were treated with the skin graft or the expanded scalp flap., Results: The operative effects were satisfactory during 6 months to 5 years of the follow-ups. No recurrence was found in all cases. Two patients treated with skin graft had lead to baldness, four patients treated with the expanded scalp flap had been good appearance., Conclusions: The method of the expanded scalp flap is good and effective treatment for the cutis verticis gyrate.

Published
2007

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