An Estimation of Exponential Sums Associated with a Cubic Form Polynomial
The method of exponential sums is one of a few general methods enabling us to solve a wide range of miscellaneous problems from the theory of numbers. The main problem of the theory of exponential sums is to obtain an upper estimate of the modulus of an exponential sum as sharp as possible. Inve...
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1999
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my-upm-ir.95062013-09-26T01:02:51Z An Estimation of Exponential Sums Associated with a Cubic Form Polynomial 1999-04 Heng, Swee Huay The method of exponential sums is one of a few general methods enabling us to solve a wide range of miscellaneous problems from the theory of numbers. The main problem of the theory of exponential sums is to obtain an upper estimate of the modulus of an exponential sum as sharp as possible. Investigation on the sums when f is a two-variable polynomial is studied using the Newton polyhedron technique. One of the methods to obtain the estimate for the above exponential sums is to consider the cardinality of the set of solutions to congruence equations modulo a prime power. A closer look on the actual cardinality on the following polynomial in a cubic form f(x,y) = ax3 + bxi + cx + dy + e has been carried out using the Direct Method with the aid of Mathematica. We reveal that the exact cardinality is much smaller in comparison with the estimation. The necessity to find a more precise estimate arises due to this big gap. By a theorem of Bezout, the number of common zeros of a pair of polynomials does not exceed the product of the degrees of both polynomials. In this research, we attempt to find a better estimate for cardinality by looking at the maximum number of common zeros associated with the partial derivatives fx(x,y) and fy(x,y). Eventually a sharper estimate of cardinality for the various conditions on the coefficients of f(x,y) can be determined and the estimate of S(f; p') obtained. Exponential sums Polynomials 1999-04 Thesis http://psasir.upm.edu.my/id/eprint/9506/ http://psasir.upm.edu.my/id/eprint/9506/1/FSAS_1999_45_A.pdf application/pdf en public masters Universiti Putra Malaysia Exponential sums Polynomials Faculty of Science and Environmental Studies English |
| institution |
Universiti Putra Malaysia |
| collection |
PSAS Institutional Repository |
| language |
English English |
| topic |
Exponential sums Polynomials |
| spellingShingle |
Exponential sums Polynomials Heng, Swee Huay An Estimation of Exponential Sums Associated with a Cubic Form Polynomial |
| description |
The method of exponential sums is one of a few general methods enabling us
to solve a wide range of miscellaneous problems from the theory of numbers. The
main problem of the theory of exponential sums is to obtain an upper estimate of the
modulus of an exponential sum as sharp as possible.
Investigation on the sums when f is a two-variable polynomial is studied using
the Newton polyhedron technique. One of the methods to obtain the estimate for the above exponential sums is to consider the cardinality of the set of solutions to
congruence equations modulo a prime power. A closer look on the actual cardinality
on the following polynomial in a cubic form
f(x,y) = ax3 + bxi + cx + dy + e
has been carried out using the Direct Method with the aid of Mathematica. We reveal
that the exact cardinality is much smaller in comparison with the estimation. The
necessity to find a more precise estimate arises due to this big gap.
By a theorem of Bezout, the number of common zeros of a pair of polynomials
does not exceed the product of the degrees of both polynomials. In this research, we
attempt to find a better estimate for cardinality by looking at the maximum number of
common zeros associated with the partial derivatives fx(x,y) and fy(x,y). Eventually a
sharper estimate of cardinality for the various conditions on the coefficients of f(x,y)
can be determined and the estimate of S(f; p') obtained. |
| format |
Thesis |
| qualification_level |
Master's degree |
| author |
Heng, Swee Huay |
| author_facet |
Heng, Swee Huay |
| author_sort |
Heng, Swee Huay |
| title |
An Estimation of Exponential Sums Associated with a Cubic Form Polynomial |
| title_short |
An Estimation of Exponential Sums Associated with a Cubic Form Polynomial |
| title_full |
An Estimation of Exponential Sums Associated with a Cubic Form Polynomial |
| title_fullStr |
An Estimation of Exponential Sums Associated with a Cubic Form Polynomial |
| title_full_unstemmed |
An Estimation of Exponential Sums Associated with a Cubic Form Polynomial |
| title_sort |
estimation of exponential sums associated with a cubic form polynomial |
| granting_institution |
Universiti Putra Malaysia |
| granting_department |
Faculty of Science and Environmental Studies |
| publishDate |
1999 |
| url |
http://psasir.upm.edu.my/id/eprint/9506/1/FSAS_1999_45_A.pdf |
| _version_ |
1747810968816058368 |