<p>Let <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10114_2025_2286_Article_IEq1.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="14" /> </InlineMediaObject> <EquationSource Format="TEX">\({\cal C}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mi mathvariant="script">C</mi> </mrow> </math></EquationSource> </InlineEquation> be a triangulated category. We define <i>m</i>-term subcategories on <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10114_2025_2286_Article_IEq2.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="14" /> </InlineMediaObject> <EquationSource Format="TEX">\({\cal C}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mi mathvariant="script">C</mi> </mrow> </math></EquationSource> </InlineEquation> induced by <i>n</i>-rigid subcategories, which are extriangulated subcategories of <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10114_2025_2286_Article_IEq3.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="14" /> </InlineMediaObject> <EquationSource Format="TEX">\({\cal C}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mi mathvariant="script">C</mi> </mrow> </math></EquationSource> </InlineEquation>. Then we give a one-to-one correspondence between cotorsion pairs on 2-term subcategories <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10114_2025_2286_Article_IEq4.gif" Format="GIF" Height="15" Rendition="HTML" Resolution="72" Type="Linedraw" Width="16" /> </InlineMediaObject> <EquationSource Format="TEX">\({\cal G}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mi mathvariant="script">G</mi> </mrow> </math></EquationSource> </InlineEquation> and support <i>τ</i>-tilting subcategories on an abelian quotient of <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10114_2025_2286_Article_IEq5.gif" Format="GIF" Height="15" Rendition="HTML" Resolution="72" Type="Linedraw" Width="16" /> </InlineMediaObject> <EquationSource Format="TEX">\({\cal G}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mi mathvariant="script">G</mi> </mrow> </math></EquationSource> </InlineEquation>. If an <i>m</i>-term subcategory is induced by a co-t-structure, then we have a one-to-one correspondence between cotorsion pairs on it and cotorsion pairs on <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10114_2025_2286_Article_IEq6.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="14" /> </InlineMediaObject> <EquationSource Format="TEX">\({\cal C}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mi mathvariant="script">C</mi> </mrow> </math></EquationSource> </InlineEquation> under certain conditions.</p>

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Cotorsion Pairs on m-term Subcategories

  • Yu Liu,
  • Panyue Zhou

摘要

Let \({\cal C}\) C be a triangulated category. We define m-term subcategories on \({\cal C}\) C induced by n-rigid subcategories, which are extriangulated subcategories of \({\cal C}\) C . Then we give a one-to-one correspondence between cotorsion pairs on 2-term subcategories \({\cal G}\) G and support τ-tilting subcategories on an abelian quotient of \({\cal G}\) G . If an m-term subcategory is induced by a co-t-structure, then we have a one-to-one correspondence between cotorsion pairs on it and cotorsion pairs on \({\cal C}\) C under certain conditions.