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  • 學位論文

論290-定理

On the 290-theorem

指導教授 : 陳其誠
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摘要


這篇文章中,我們研究 Manjul Bhargava 與 Jonathan Hanke 的 290 定理。主要是透過分類一些被稱作上升子的特殊基本二次形,建立起決定任一正定整係數二次形是否為宇態二次形的準則。

關鍵字

二次形 整係數 表現

並列摘要


In this thesis, we study the 290-theorem of Manjul Bhargava and Jonathan Hanke. Via the classification of certain basic quadratic forms called escalators, we can establish an efficient criterion to determine whether a positive integral quadratic form is universal.

參考文獻


[2] G.L.Watson, Integral quadratic forms, Cambridge University Press, 1960.
[3] Jonathan Hanke, local densities and explicit bounds for representatability by a quadratic form, Duke Math. J.124(2004), no 2, 351-388.
[4] Jean-Pierre Serre, A course in arithmetic, Graduate Texts in Mathematics 7. Springer-Verlag, New York, 1973.
[5] Larry J.Gerstein, Basic quadratic forms, American Mathematical Society, 2008.
[6] Manjul Bhargava and Jonathan Hanke, Universal quadratic forms and 290 theorem, Invent. Math.,2005.

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