<p>The goal of this paper is to construct the Hilbert scheme of complete intersections in the biprojective space <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\( X = \mathbb {P}^m \times \mathbb {P}^n \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>X</mi> <mo>=</mo> <msup> <mrow> <mi mathvariant="double-struck">P</mi> </mrow> <mi>m</mi> </msup> <mo>×</mo> <msup> <mrow> <mi mathvariant="double-struck">P</mi> </mrow> <mi>n</mi> </msup> </mrow> </math></EquationSource> </InlineEquation>. For this purpose, we define a partial order on the bidegrees of the bihomogeneous forms. As a consequence of this construction, we provide an explicit computation of the Hilbert scheme for curves of genus 7 and 8 listed in [<CitationRef CitationID="CR1">1</CitationRef>] and [<CitationRef CitationID="CR11">11</CitationRef>] that are complete intersections. Finally, we construct the coarse moduli space of canonical complete intersections in <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\( \mathbb {P}^m \times \mathbb {P}^n \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msup> <mrow> <mi mathvariant="double-struck">P</mi> </mrow> <mi>m</mi> </msup> <mo>×</mo> <msup> <mrow> <mi mathvariant="double-struck">P</mi> </mrow> <mi>n</mi> </msup> </mrow> </math></EquationSource> </InlineEquation>.</p>

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On Hilbert scheme of complete intersection on the biprojective

  • Aislan Leal Fontes,
  • Maxwell da Paixão de Jesus Santos

摘要

The goal of this paper is to construct the Hilbert scheme of complete intersections in the biprojective space \( X = \mathbb {P}^m \times \mathbb {P}^n \) X = P m × P n . For this purpose, we define a partial order on the bidegrees of the bihomogeneous forms. As a consequence of this construction, we provide an explicit computation of the Hilbert scheme for curves of genus 7 and 8 listed in [1] and [11] that are complete intersections. Finally, we construct the coarse moduli space of canonical complete intersections in \( \mathbb {P}^m \times \mathbb {P}^n \) P m × P n .