Any closed hypersurface has at least one point where all curvatures are positive












0












$begingroup$


Any closed hypersurface has at least one point where all curvatures are positive.



How to prove this statement?



I found that statement at the paper "
Volume-preserving flow by powers of the mth mean curvature"



I don't have any idea... they said it's like a trivial one.










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$endgroup$












  • $begingroup$
    from the orthogonality we can say at least one point per dimension where curvature is positive. But all at one point?
    $endgroup$
    – John L Winters
    Dec 8 '18 at 5:25












  • $begingroup$
    Yes! The title is exact statement from the paper.
    $endgroup$
    – boytaehun
    Dec 8 '18 at 13:07
















0












$begingroup$


Any closed hypersurface has at least one point where all curvatures are positive.



How to prove this statement?



I found that statement at the paper "
Volume-preserving flow by powers of the mth mean curvature"



I don't have any idea... they said it's like a trivial one.










share|cite|improve this question









$endgroup$












  • $begingroup$
    from the orthogonality we can say at least one point per dimension where curvature is positive. But all at one point?
    $endgroup$
    – John L Winters
    Dec 8 '18 at 5:25












  • $begingroup$
    Yes! The title is exact statement from the paper.
    $endgroup$
    – boytaehun
    Dec 8 '18 at 13:07














0












0








0





$begingroup$


Any closed hypersurface has at least one point where all curvatures are positive.



How to prove this statement?



I found that statement at the paper "
Volume-preserving flow by powers of the mth mean curvature"



I don't have any idea... they said it's like a trivial one.










share|cite|improve this question









$endgroup$




Any closed hypersurface has at least one point where all curvatures are positive.



How to prove this statement?



I found that statement at the paper "
Volume-preserving flow by powers of the mth mean curvature"



I don't have any idea... they said it's like a trivial one.







differential-geometry






share|cite|improve this question













share|cite|improve this question











share|cite|improve this question




share|cite|improve this question










asked Dec 8 '18 at 5:18









boytaehunboytaehun

111




111












  • $begingroup$
    from the orthogonality we can say at least one point per dimension where curvature is positive. But all at one point?
    $endgroup$
    – John L Winters
    Dec 8 '18 at 5:25












  • $begingroup$
    Yes! The title is exact statement from the paper.
    $endgroup$
    – boytaehun
    Dec 8 '18 at 13:07


















  • $begingroup$
    from the orthogonality we can say at least one point per dimension where curvature is positive. But all at one point?
    $endgroup$
    – John L Winters
    Dec 8 '18 at 5:25












  • $begingroup$
    Yes! The title is exact statement from the paper.
    $endgroup$
    – boytaehun
    Dec 8 '18 at 13:07
















$begingroup$
from the orthogonality we can say at least one point per dimension where curvature is positive. But all at one point?
$endgroup$
– John L Winters
Dec 8 '18 at 5:25






$begingroup$
from the orthogonality we can say at least one point per dimension where curvature is positive. But all at one point?
$endgroup$
– John L Winters
Dec 8 '18 at 5:25














$begingroup$
Yes! The title is exact statement from the paper.
$endgroup$
– boytaehun
Dec 8 '18 at 13:07




$begingroup$
Yes! The title is exact statement from the paper.
$endgroup$
– boytaehun
Dec 8 '18 at 13:07










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