Stably irrational hypersurfaces of small slopes
Stably irrational hypersurfaces of small slopes
复制标题
小坡度的稳定无理超曲面
DOI:
--
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发表时间:
2018
影响因子:
3.9
通讯作者:
Stefan Schreieder
中科院分区:
文献类型:
--
作者:
Stefan Schreieder
<p>Let <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="k">
<mml:semantics>
<mml:mi>k</mml:mi>
<mml:annotation encoding="application/x-tex">k</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> be an uncountable field of characteristic different from two. We show that a very general hypersurface <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper X subset-of double-struck upper P Subscript k Superscript upper N plus 1">
<mml:semantics>
<mml:mrow>
<mml:mi>X</mml:mi>
<mml:mo>⊂<!-- ⊂ --></mml:mo>
<mml:msubsup>
<mml:mrow class="MJX-TeXAtom-ORD">
<mml:mi mathvariant="double-struck">P</mml:mi>
</mml:mrow>
<mml:mi>k</mml:mi>
<mml:mrow class="MJX-TeXAtom-ORD">
<mml:mi>N</mml:mi>
<mml:mo>+</mml:mo>
<mml:mn>1</mml:mn>
</mml:mrow>
</mml:msubsup>
</mml:mrow>
<mml:annotation encoding="application/x-tex">Xsubset mathbb {P}^{N+1}_k</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> of dimension <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper N greater-than-or-equal-to 3">
<mml:semantics>
<mml:mrow>
<mml:mi>N</mml:mi>
<mml:mo>≥<!-- ≥ --></mml:mo>
<mml:mn>3</mml:mn>
</mml:mrow>
<mml:annotation encoding="application/x-tex">Ngeq 3</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> and degree at least <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="log Subscript 2 Baseline upper N plus 2">
<mml:semantics>
<mml:mrow>
<mml:msub>
<mml:mi>log</mml:mi>
<mml:mn>2</mml:mn>
</mml:msub>
<mml:mo><!-- --></mml:mo>
<mml:mi>N</mml:mi>
<mml:mo>+</mml:mo>
<mml:mn>2</mml:mn>
</mml:mrow>
<mml:annotation encoding="application/x-tex">log _2N +2</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> is not stably rational over the algebraic closure of <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="k">
<mml:semantics>
<mml:mi>k</mml:mi>
<mml:annotation encoding="application/x-tex">k</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula>.</p>
影响因子:
3.7
作者:
Hassett, Brendan;Pirutka, Alena;Tschinkel, Yuri
通讯作者:
Tschinkel, Yuri