研究生: |
李麗梅 LI-MEI LI |
---|---|
論文名稱: |
Some Algorithms of Corner-Elements in Monomial Ideals |
指導教授: |
劉容真
Liu, Jung-Chen |
學位類別: |
碩士 Master |
系所名稱: |
數學系 Department of Mathematics |
論文出版年: | 2007 |
畢業學年度: | 95 |
語文別: | 英文 |
論文頁數: | 42 |
英文關鍵詞: | monomial ideal, corner-element, algorithm |
論文種類: | 學術論文 |
相關次數: | 點閱:225 下載:7 |
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Monomial ideals 在某些數學領域是重要的。在 [HRS], [HMRS] and [L] 這三篇論文中,corner-elements 在找唯一的 irredundant parametric decomposition of a monomial ideal上扮演一個重要的角色。雖然在幾篇論文裡已經有一些找corner-elements 的演算法,但是使用這些演算法去找 I-corner-elements,我們必需先計算I的irredundant parametric decomposition 或者是不在 I 的the monomials。因此我們給了兩種不用先計算它們就可以找到corner-elements 的方法。最後,我們在 k[X,Y,Z] 裡造一些具有某些特殊性質的 monomial ideals。
Monomial ideals are important in several areas of mathematics. In [HRS], [HMRS] and [L], corner-elements play an important role in finding the unique irredundant parametric decomposition of a monomial ideal. There are a few algorithms for finding corner-elements provided in several articles, however, using these algorithms to find
I-corner-elements, we need to compute the irredundant parametric decomposition of I or the monomials not in I first. Hence we give two methods to find corner-elements without computing them. Finally, we construct some monomial ideals in k[X,Y,Z] having some special property.
[L] J.-C. Liu, Algorithms on Parametric Decomposition of Monomial Ideals, Comm. in Algebra, 30(7)(2002), 3435-3456.
[CLO] D. Cox, J. Little, and D. O’shea, Ideals, Varieties, and Algorithms : An Introduction to Computational Algebraic Geometry and Commutative Algebra, 2nd ed., Springer-Verlag, New York-Berlin-Heidelberg, 1997.
[HMRS] W. Heinzer, Ahmad Mirbagheri, L. J. Ratliff, Jr., and K. Shah, Parametric Decompositions of Monomial Ideals(II), J. Alegbra 187(1997), 120-149.
[HRS] W. Heinzer, L. J. Ratliff, Jr., and K. Shah, Parametric Decompositions of Monomial Ideals(I), Houston J. Math 21(1)(1995), 29-52.
[EH] J. A. Eagon and M. Hochster, R-sequences and Indeterminates, Quart. J. Math 25(1974), 61-71.
[T] D. Taylor, Ideals Generated By Monomials In An R-Sequence, Ph.D. Dissertation, U. Chicago, 1966.