<p>We prove some estimates for the infimum and supremum of the squared norm of the second fundamental form of <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12215_2025_1302_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="99" /> </InlineMediaObject> <EquationSource Format="TEX">\(O(n)\times O(m)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>O</mi> <mo stretchy="false">(</mo> <mi>n</mi> <mo stretchy="false">)</mo> <mo>×</mo> <mi>O</mi> <mo stretchy="false">(</mo> <mi>m</mi> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation>-invariant hypersurfaces in <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12215_2025_1302_Article_IEq5.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="40" /> </InlineMediaObject> <EquationSource Format="TEX">\(\mathbb {R}^{n+m}\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mrow> <mi>n</mi> <mo>+</mo> <mi>m</mi> </mrow> </msup> </math></EquationSource> </InlineEquation> with constant mean curvature <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12215_2025_1302_Article_IEq6.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="48" /> </InlineMediaObject> <EquationSource Format="TEX">\(H&gt;0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>H</mi> <mo>&gt;</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation>.</p>

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\(O(n)\times O(m)\)-invariant hypersurfaces with constant mean curvature in Euclidean space

  • Eduardo Rodríguez-Romero,
  • Josué Meléndez

摘要

We prove some estimates for the infimum and supremum of the squared norm of the second fundamental form of \(O(n)\times O(m)\) O ( n ) × O ( m ) -invariant hypersurfaces in \(\mathbb {R}^{n+m}\) R n + m with constant mean curvature \(H>0\) H > 0 .