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論文名稱 Title |
有關無窮矩陣之項滿足某些二冪次遞迴公式的討論 On infinite matrices whose entries satisfying certain dyadic recurrent formula |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
22 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2007-06-15 |
繳交日期 Date of Submission |
2007-07-25 |
關鍵字 Keywords |
有界矩陣、斜扥普立茲算子、二冪次遞迴公式、位移算子、可分希爾伯特空間 slant Toeplitz operator, shift operator, separable Hilbert space, bounded matrix, dyadic recurrent formula |
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統計 Statistics |
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中文摘要 |
設(b$_{i,j}$)是一個定義在 extit{ l}$^{2}$上的有界矩陣,$BbbT={zinBbb C:|z|=1}$,A是一個在L$^{2}(mathbb{T)}$上的有界矩陣滿足下列情形 1.$langle Az^{2j},z^{2i} angle =sigma ^{-1}b_{ij}+|alpha |^{2}sigma ^{-1}langle Az^{j},z^{i} angle $ 2.$langle Az^{2j},z^{2i-1} angle =-alpha sigma ^{-1}b_{ij}+alpha sigma ^{-1}langle Az^{j},z^{i} angle $ 3.$langle Az^{2j-1},z^{2i} angle =-overline{alpha }sigma ^{-1}b_{ij}+overline{alpha }sigma ^{-1}langle Az^{j},z^{i} angle $ 4.$langle Az^{2j-1},z^{2i-1} angle =|alpha |^{2}sigma ^{-1}b_{ij}+sigma ^{-1}langle Az^{j},z^{i} angle $ 對於所有$i,jin mathbb{Z}$, 其中$sigma =1+|alpha |^{2},,alpha in mathbb{C},alpha eq0$ 上述情形給了我們一個二冪次遞迴關係。下圖表示矩陣第$ij$項如何生成對應的二乘二的區塊的項 {$a_{2i,2j}, a_{2i-1,2j}, a_{2i,2j-1}, a_{2i-1,2j-1}$ } egin{figure}[hp] egin{center} includegraphics[scale=0.42]{cubic.pdf} end{center} caption{此二幕次遞迴的形式} end{figure} 由於[2]中可知$displaystyle A=sum_{n=0}^{infty }S^{n}BS^{ast n}$, 其中 $ Sz^i=sigma ^{-1/2}(overline{alpha }z^{2i}+z^{2i-1})$ $ B=sum sum b_{ij}(u_{i}otimes u_{j})$ ;;; which $u_{i}(z)=sigma ^{-1/2}z^{2i-1}(alpha -z)$ 則我們可以用它來求出符合上述情形的$a_{ij}$的明確公式。 |
Abstract |
Let (b$_{i,j}$) be a bounded matrix on extit{ l}$^{2}$, $Bbb T={zinBbb C:|z|=1}$, and A be a bounded matrix on L$^{ 2}(mathbb{T)}$ satisfying the conditions 1.$langle Az^{2j},z^{2i} angle =sigma ^{-1}b_{ij}+|alpha |^{2}sigma ^{-1}langle Az^{j},z^{i} angle $; 2.$langle Az^{2j},z^{2i-1} angle =-alpha sigma ^{-1}b_{ij}+alpha sigma ^{-1}langle Az^{j},z^{i} angle $; 3.$langle Az^{2j-1},z^{2i} angle =-overline{alpha }sigma ^{-1}b_{ij}+overline{alpha }sigma ^{-1}langle Az^{j},z^{i} angle$; 4.$langle Az^{2j-1},z^{2i-1} angle =|alpha |^{2}sigma ^{-1}b_{ij}+sigma ^{-1}langle Az^{j},z^{i} angle $ hspace{-0.76cm} for all $i,jin mathbb{Z}$, where $sigma =1+|alpha |^{2},,alpha in mathbb{C},alpha eq0$. The above conditions evidently suggests that there is a "dyadic" relation in the entries of $A$. Here in the following picture illustrates how each $ij-$th entry of $A$ generates the 2 by 2 block in $A$ with entries ${a_{2i 2j}, a_{2i-1 2j}, a_{2i 2j-1}, a_{2i-1 2j-1}}.$ vspace{-0.3cm} egin{figure}[hp] egin{center} includegraphics[scale=0.42]{cubic.pdf} end{center} vspace{-0.8cm}caption{The dyadic recurrent form} end{figure} It has been shown [2] that $displaystyle A=sum_{n=0}^{infty }S^{n}BS^{ast n}$, where $Sz^i=sigma ^{-1/2}(overline{alpha }z^{2i}+z^{2i-1})$ and $$B=sumlimits_{i=-infty}^infty sumlimits_{j=-infty}^infty b_{ij}(u_{i}otimes u_{j}), u_{i}(z)=sigma ^{-1/2}z^{2i-1}(alpha -z).$$ In this paper, we shall use the above relations to compute $langle a_{i,j} angle $ explicitly. ewline Key words: shift operator, bounded matrix, dyadic recurrent formula, slant Toeplitz operator, separable Hilbert space 2.$langle Az^{2j},z^{2i-1} angle =-alpha sigma ^{-1}b_{ij}+alpha sigma ^{-1}langle Az^{j},z^{i} angle $ 3.$langle Az^{2j-1},z^{2i} angle =-overline{alpha }sigma ^{-1}b_{ij}+overline{alpha }sigma ^{-1}langle Az^{j},z^{i} angle $ 4.$langle Az^{2j-1},z^{2i-1} angle =|alpha |^{2}sigma ^{-1}b_{ij}+sigma ^{-1}langle Az^{j},z^{i} angle $ for all $i,jin mathbb{Z}$, where $sigma =1+|alpha |^{2},,alpha in mathbb{C},alpha eq0$ egin{figure}[hp] egin{center} includegraphics[scale=0.42]{cubic.pdf} end{center} caption{The dyadic recurrent form} end{figure} Since it has been shown [2] that $displaystyle A=sum_{n=0}^{infty }S^{n}BS^{ast n}$, where $ Sz^i=sigma ^{-1/2}(overline{alpha }z^{2i}+z^{2i-1})$ $ B=sum sum b_{ij}(u_{i}otimes u_{j})$ ;;; which $u_{i}(z)=sigma ^{-1/2}z^{2i-1}(alpha -z)$ Then we can use it to compute $langle Az^{j},z^{i} angle $ explicity if A satisfies the previous condition. ewline Key words: shift operator, bounded matrix, dyadic recurrent formula, slant Toeplitz operator, separable Hilbert space |
目次 Table of Contents |
1 Introduction -------------------------------------iv 2 The operators that constant with S ------vii |
參考文獻 References |
[1] Mark C. Ho, Adjoint of slant Toeplitz operators II, Integral Equations and Operator Theory, 2001(41),pp.179-188 . [2] Mark C. Ho and Mu Ming Wong, Operators that commute with slant Toeplitz operators, submitting . [3] R. Bowen, Equilibrium State and the Ergodic Theory of Anosov Diffeomorphism, Lecture Notes in Mathematics, no. 470, Springer-Verlag, Berlin, New York, 1975. [4] D. Chen and X. Zheng, Spectral radii and eigenvalues of subdivision operators, preprint. [5] A. Cohen and I. Daubechies, A stability criterion for biorthogonal wavelet bases and their related subband coding scheme, Duke Math. J., 68, no. 2, 1992, pp.313-335. [6] A. Cohen and I. Daubechies, A new technique to estimate the regularity of refinable functions, Revista Mathematica Iberoamericana, 12, 1996, pp.527-591. [7] J.B. Conway, The Theory of Subnormal Operators, Mathematical Surveys and Monographs, 36, American Mathematical Society, Providence, 1991. [8] I. Daubechies, I. Guskov and W. Sweldens, Regularity of irregular subdivision, Constructive Approximation, 15, no. 3, 1999, pp.381-426. [9] M. Ho, Adjoints of slant Toeplitz operators, Integral Equations and Operator Theory, 29, 1997, pp.301-312. xvi [10] M. Ho, Adjoints of slant Toeplitz operators II, Integral Equations and Operator Theory, 41, 2001, pp.179-188. [11] M. Rosenblum and J. Rovnyak, Hardy Classes and Operator Theory, Oxford University Press, New York, 1985. [12] G. Strang, Eigenvalues of (#2)H and convergence of the cascade algorithm, IEEE Trans. Sig. Proc., 1996. [13] W. Sweldens and P. Schr¨oder, Building your own wavelets at home, Wavelets in Computer Graphics, ACMSIGGRAPH Course Notes, 1996. [14] L. Villemoes, Wavelet analysis of refinement equations, SIAM J. Maths. Analysis, 25, no. 5, 1994, pp.1433-1460. [15] P. Walters, An Introduction to Ergodic Theory, Graduate Text in Mathematics, 79, Springer-Verlag, New York, 1982. |
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