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UNIVERSAL QUADRATIC FORMS OVER POLYNOMIAL RINGS

  • Kim, Myung-Hwan (Department of Mathematical Sciences Seoul National University) ;
  • Wang, Yuanhua (Graudate School Chinese Academy of Sciences) ;
  • Xu, Fei (Academy of Mathematics and System Science Chinese Academy of Sciences)
  • Published : 2008.09.30

Abstract

The Fifteen Theorem proved by Conway and Schneeberger is a criterion for positive definite quadratic forms over the rational integer ring to be universal. In this paper, we give a proof of an analogy of the Fifteen Theorem for definite quadratic forms over polynomial rings, which is known as the Four Conjecture proposed by Gerstein.

Keywords

References

  1. M. Bhargava, On the Conway-Schneeberger fifteen theorem, Quadratic forms and their applications (Dublin, 1999), 27-37, Contemp. Math., 272, Amer. Math. Soc., Providence, RI, 2000 https://doi.org/10.1090/conm/272/04395
  2. D. Z. Djokovic, Hermitian matrices over polynomial rings, J. Algebra 43 (1976), no. 2, 359-374 https://doi.org/10.1016/0021-8693(76)90119-8
  3. W. Duke, Some old problems and new results about quadratic forms, Notices Amer. Math. Soc. 44 (1997), no. 2, 190-196
  4. L. Gerstein, On representation by quadratic $\mathbb{F}_{q}$[x]-lattices, Algebraic and arithmetic theory of quadratic forms, 129-134, Contemp. Math., 344, Amer. Math. Soc., Providence, RI, 2004 https://doi.org/10.1090/conm/344/06213
  5. M.-H. Kim, Recent developments on universal forms, Algebraic and arithmetic theory of quadratic forms, 215-228, Contemp. Math., 344, Amer. Math. Soc., Providence, RI, 2004 https://doi.org/10.1090/conm/344/06218
  6. B. M. Kim, M.-H. Kim, and B.-K. Oh, 2-universal positive definite integral quinary quadratic forms, Integral quadratic forms and lattices (Seoul, 1998), 51-62, Contemp. Math., 249, Amer. Math. Soc., Providence, RI, 1999 https://doi.org/10.1090/conm/249/03747
  7. B. M. Kim, M.-H. Kim, and B.-K. Oh, A finiteness theorem for representability of quadratic forms by forms, J. Reine Angew. Math. 581 (2005), 23-30
  8. M. Kneser, Darstellungsmasse indefiniter quadratischer Formen, Math. Z. 77 (1961), 188-194 https://doi.org/10.1007/BF01180172
  9. W. Leahey, Sums of squares of polynomials with coefficients in a finite field, Amer. Math. Monthly 74 (1967), 816-819 https://doi.org/10.2307/2315800
  10. O. T. O'Meara, The integral representations of quadratic forms over local fields, Amer. J. Math. 80 (1958), 843-878 https://doi.org/10.2307/2372837
  11. O. T. O'Meara, Introduction to Quadratic Forms, Springer-Verlag, Berlin, 2000
  12. W. Schneeberger, Arithmetic and geometry of integral lattices, Ph.D. Thesis, Princeton University, 1995

Cited by

  1. UNIVERSAL QUATERNARY LATTICES OVER F q[x] vol.28, pp.5, 2012, https://doi.org/10.7858/eamj.2012.046