437,657 research outputs found
Structural and optical properties of MOCVD AllnN epilayers
7] M.-Y. Ryu, C.Q. Chen, E. Kuokstis, J.W. Yang, G. Simin, M. Asif Khan, Appl. Phys. Lett. 80 (2002) 3730. [8] D. Xu, Y. Wang, H. Yang, L. Zheng, J. Li, L. Duan, R. Wu, Sci. China (a) 42 (1999) 517. [9] H. Hirayama, A. Kinoshita, A. Hirata, Y. Aoyagi, Phys. Stat. Sol. (a) 188 (2001) 83. [10] Y. Chen, T. Takeuchi, H. Amano, I. Akasaki, N. Yamada, Y. Kaneko, S.Y. Wang, Appl. Phys. Lett. 72 (1998) 710. [11] Ig-Hyeon Kim, Hyeong-Soo Park, Yong-Jo Park, Taeil Kim, Appl. Phys. Lett. 73 (1998) 1634. [12] K. Watanabe, J.R. Yang, S.Y. Huang, K. Inoke, J.T. Hsu, R.C. Tu, T. Yamazaki, N. Nakanishi, M. Shiojiri, Appl. Phys. Lett. 82 (2003) 718
The Chen-Ruan cohomology of moduli of curves of genus 2 with marked points
In this work we describe the Chen-Ruan cohomology of the moduli stacks of
smooth and stable genus 2 pointed curves, and its algebraic counterpart: the
stringy Chow ring. In the first half of the paper we compute the additive
structure of the Chen-Ruan cohomology ring for the moduli stack of stable
pointed genus 2 curves, describing it as a rationally graded vector space. In
the second part we give generators for the even Chen--Ruan cohomology ring as
an algebra on the ordinary cohomology.Comment: 48 pages, 3 Figures. Final version to appear in Advances in
Mathematic
On the Berg--Chen--Ismail theorem and the Nevanlinna-Pick problem
In 2002 C. Berg, Y. Chen, and M. Ismail found a nice relation between the
determinancy of the Hamburger moment problem and asymptotic behavior of the
smallest eigenvalues of the corresponding Hankel matrices. We investigate
whether an analog of this statement holds for the Nevanlinna--Pick
interpolation problem.Comment: 5 pages, LaTeX fil
A Note on Doubly Warped Product Contact CR-Submanifolds in trans-Sasakian Manifolds
Warped product CR-submanifolds in Kaehlerian manifolds were intensively
studied only since 2001 after the impulse given by B.Y. Chen. Immediately
after, another line of research, similar to that concerning Sasakian geometry
as the odd dimensional version of Kaehlerian geometry, was developed, namely
warped product contact CR-submanifolds in Sasakian manifolds. In this note we
proved that there exists no proper doubly warped product contact
CR-submanifolds in trans-Sasakian manifolds.Comment: 5 Latex page
- …