<p>Let <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\mathbb {F}_{q^m}\)</EquationSource> </InlineEquation> be the finite field of order <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(q^m\)</EquationSource> </InlineEquation>, where <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(m\ge 2\)</EquationSource> </InlineEquation> and <i>q</i> a prime power. Given <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\mathbb {F}_q\)</EquationSource> </InlineEquation>-affine hyperplanes <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(A_1,\ldots , A_m\)</EquationSource> </InlineEquation> of <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\(\mathbb {F}_{q^m}\)</EquationSource> </InlineEquation> in general position, we study the existence of a primitive element <InlineEquation ID="IEq7"> <EquationSource Format="TEX">\(\alpha \)</EquationSource> </InlineEquation> of <InlineEquation ID="IEq8"> <EquationSource Format="TEX">\(\mathbb {F}_{q^m}\)</EquationSource> </InlineEquation>, such that <InlineEquation ID="IEq9"> <EquationSource Format="TEX">\(a\alpha ^2+b\alpha +c\)</EquationSource> </InlineEquation> (<InlineEquation ID="IEq10"> <EquationSource Format="TEX">\(a\ne 0\)</EquationSource> </InlineEquation> and <InlineEquation ID="IEq11"> <EquationSource Format="TEX">\(b^2\ne 4ac\)</EquationSource> </InlineEquation>) is also primitive in <InlineEquation ID="IEq12"> <EquationSource Format="TEX">\(\mathbb {F}_{q^m}\)</EquationSource> </InlineEquation> and the primitive pair avoids <InlineEquation ID="IEq13"> <EquationSource Format="TEX">\(A_i\)</EquationSource> </InlineEquation> for every <InlineEquation ID="IEq14"> <EquationSource Format="TEX">\(i=1,\ldots ,m\)</EquationSource> </InlineEquation>. In particular, we employ the character sum method to attack this problem, which leads us in a natural manner to study novel incomplete character sum estimates and obtain results for fields of high order.</p>

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Existence of special types of primitive pairs in finite fields avoiding affine hyperplanes

  • Himangshu Hazarika,
  • Giorgos Kapetanakis,
  • Dhiren Kumar Basnet

摘要

Let \(\mathbb {F}_{q^m}\) be the finite field of order \(q^m\) , where \(m\ge 2\) and q a prime power. Given \(\mathbb {F}_q\) -affine hyperplanes \(A_1,\ldots , A_m\) of \(\mathbb {F}_{q^m}\) in general position, we study the existence of a primitive element \(\alpha \) of \(\mathbb {F}_{q^m}\) , such that \(a\alpha ^2+b\alpha +c\) ( \(a\ne 0\) and \(b^2\ne 4ac\) ) is also primitive in \(\mathbb {F}_{q^m}\) and the primitive pair avoids \(A_i\) for every \(i=1,\ldots ,m\) . In particular, we employ the character sum method to attack this problem, which leads us in a natural manner to study novel incomplete character sum estimates and obtain results for fields of high order.