Finite Fields and Applications: Proceedings of The Fifth by Kanat Abdukhalikov (auth.), Dieter Jungnickel, Harald PDF

By Kanat Abdukhalikov (auth.), Dieter Jungnickel, Harald Niederreiter (eds.)

ISBN-10: 364256755X

ISBN-13: 9783642567551

ISBN-10: 3642624987

ISBN-13: 9783642624988

The 5th overseas convention on Finite Fields and functions Fq5 held on the college of Augsburg, Germany, from August 2-6, 1999 persevered a sequence of biennial overseas meetings on finite fields. The complaints record the gradually expanding curiosity during this subject. Finite fields have an inherently interesting constitution and are very important instruments in discrete arithmetic. Their purposes diversity from combinatorial layout thought, finite geometries, and algebraic geometry to coding idea, cryptology, and clinical computing. a very fruitful element is the interaction among conception and purposes which has resulted in many new views in learn on finite fields. This interaction has consistently been a dominant subject matter in Fq meetings and was once greatly in facts at Fq5. The lawsuits mirror this, and provide an up to date selection of surveys and unique learn articles by means of best specialists within the region.

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Additional info for Finite Fields and Applications: Proceedings of The Fifth International Conference on Finite Fields and Applications F q 5, held at the University of Augsburg, Germany, August 2–6, 1999

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We can view F(x, y), H(x, y) as univariate polynomials in y with coefficients in F(x), the rational function field in x. Since gcd(F(x, y), H(x, y)) = 1 in JF[x,y], we still have gcd(F(x,y),H(x,y)) = 1 in F(x)[y). By the Euclidean algorithm, there are polynomials Uo,Vo E F(x)[y) such that UoF + VoH = 1. 48 Joel V. Brawley, Shuhong Gao and Donald Mills By eliminating the denominators in Uo, Vo, we have UF+VH=W (4) for some U, V E JB1x, y] and W E JB1x] with W "I O. Let f. = fx and m = h x be the degrees in x of F(x,y) and H(x,y), respectively.

1. 2. The set Sh, forms a local integral basis at all places other than Po and thus is an integral basis for OTn over OT, . Acknowledgements Vinay Deolalikar and P. Vijay Kumar acknowledge the gracious help accorded by the late Prof. Dennis Estes, who very tragically passed away while this work was still being done. Without his help, this work could not have been done. We also thank Prof. Kyeongcheol Yang and Kenneth Shum for many interesting discussions. 24 Aleshnikov, Deolalikar, Kumar and Stichtenoth References 1.

If G has even order, then no self-dual normal basis exists in general. In particular, if L is a field, Galois extension of k with group G of even order, then L does not have any self~dual normal basis over k. However, we saw in §8 that the G-form qL is uniquely determined by the discriminant of L. In Self-Dual Normal Bases and Related Topics 35 other words, qL is isomorphic to a G-form that we denoted by Qd in §7. The aim of this section is to give explicit models for the G-form Qd. All the above hypothesis are satisfied in the case of extensions of finite fields, which is the main case of interest here.

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Finite Fields and Applications: Proceedings of The Fifth International Conference on Finite Fields and Applications F q 5, held at the University of Augsburg, Germany, August 2–6, 1999 by Kanat Abdukhalikov (auth.), Dieter Jungnickel, Harald Niederreiter (eds.)

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