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Titlebook: Advanced Topics in Computational Number Theory; Henri Cohen Textbook 2000 Springer Science+Business Media New York 2000 Euclidean algorith

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发表于 2025-3-21 16:19:39 | 显示全部楼层 |阅读模式
期刊全称Advanced Topics in Computational Number Theory
影响因子2023Henri Cohen
视频video
学科分类Graduate Texts in Mathematics
图书封面Titlebook: Advanced Topics in Computational Number Theory;  Henri Cohen Textbook 2000 Springer Science+Business Media New York 2000 Euclidean algorith
影响因子The computation of invariants of algebraic number fields such as integral bases, discriminants, prime decompositions, ideal class groups, and unit groups is important both for its own sake and for its numerous applications, for example, to the solution of Diophantine equations. The practical com­ pletion of this task (sometimes known as the Dedekind program) has been one of the major achievements of computational number theory in the past ten years, thanks to the efforts of many people. Even though some practical problems still exist, one can consider the subject as solved in a satisfactory manner, and it is now routine to ask a specialized Computer Algebra Sys­ tem such as Kant/Kash, liDIA, Magma, or Pari/GP, to perform number field computations that would have been unfeasible only ten years ago. The (very numerous) algorithms used are essentially all described in A Course in Com­ putational Algebraic Number Theory, GTM 138, first published in 1993 (third corrected printing 1996), which is referred to here as [CohO]. That text also treats other subjects such as elliptic curves, factoring, and primality testing. Itis important and natural to generalize these algorithms. Several gen
Pindex Textbook 2000
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https://doi.org/10.1007/978-3-662-48347-3In Chapter 3 we studied variants of class and unit groups, the ray class groups .(.), as well as the associated unit groups .(.) of units multiplicatively congruent to 1 modulo m. The fundamental application of these notions through the deep theorems of class field theory is the construction of Abelian extensions.
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A. J. El Haj,K. Hampson,G. GogniatIn this appendix, we regroup and prove a number of results that we need.
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https://doi.org/10.1007/978-1-4615-0767-3n practice, however, number fields are frequently not given in this way. One of the most common other ways is to give a number field as a . extension, in other words as an algebra . over some base field . that is not necessarily equal to √. necessarily equal to ℚ. In this case, the basic algebraic o
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Bioreaction Engineering Principles, [Jan], or [Mart4] for more detailed statements and proofs. We present the results “à la Hasse”, without using ideles. This is more suitable for algorithmic treatment. For an idelic treatment, we refer to [Neu]. I have largely benefited from the notes of J. Martinet [Mart4] in writing this chapter.
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Zhi-Jun Zhang,Jiang Pan,Bao-Di Ma,Jian-He Xuor absolute discriminants. However, the algorithmic construction of these extensions is not completely straightforward. There are several ways to do this, but at present the most efficient general method is the use of Kummer extensions. In the next chapter, we will describe two other methods using a
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