On hypersurfaces with parallel M¨obius form and constant para-Blaschke eigenvalues

On hypersurfaces with parallel M¨obius form and constant para-Blaschke eigenvalues

In this paper, we classify umbilic-free hypersurfaces of the unit sphere that have constant para-Blaschkeeigenvalues and possess parallel Mobius form. To achieve the classification, we first of all show that, under the conditionof having constant para-Blaschke eigenvalues, an umbilic-free hypersurface of the unit sphere is of parallel Mobius formif and only if its M¨obius form vanishes identically.

___

  • [1] Akivis MA, Goldberg VV. A conformal differential invariant and the conformal rigidity of hypersurfaces. Proc Amer Math Soc 1997; 125: 2415-2424.
  • [2] Cheng QM, Li XX, Qi XR. A classification of hypersurfaces with parallel para-Blaschke tensor in S m+1 . Int J Math 2010; 21: 297-316.
  • [3] Hu ZJ, Li DY. M¨obius isoparametric hypersurfaces with three distinct principal curvatures. Pacific J Math 2007; 232: 289-311.
  • [4] Hu ZJ, Li HZ. Classification of hypersurfaces with parallel M¨obius second fundamental form in S n+1 . Science in China Ser A Math 2004; 47: 417-430.
  • [5] Hu ZJ, Li HZ. Classification of M¨obius isoparametric hypersurfaces in S 4 . Nagoya Math J 2005; 179: 147-162.
  • [6] Hu ZJ, Li HZ, Wang CP. Classification of M¨obius isoparametric hypersurfaces in S 5 . Monatsh Math 2007; 151: 202-222.
  • [7] Hu ZJ, Li XX, Zhai SJ. On the Blaschke isoparametric hypersurfaces in the unit sphere with three distinct Blaschke eigenvalues. Sci China Math 2011; 54: 2171-2194.
  • [8] Hu ZJ, Tian XL. On M¨obius form and M¨obius isoparametric hypersurfaces. Acta Math Sinica (Engl Ser) 2009; 25: 2077-2092.
  • [9] Hu ZJ, Zhai SJ. Classification of M¨obius isoparametric hypersurfaces in S 6 . Tohoku Math J 2008; 60: 499-526.
  • [10] Hu ZJ, Zhai SJ. M¨obius isoparametric hypersurfaces with three distinct principal curvatures II. Pacific J Math 2011; 249: 343-370.
  • [11] Hu ZJ, Zhai SJ. Submanifolds with parallel M¨obius second fundamental form in the unit sphere. Preprint, 2015.
  • [12] Li HZ, Liu, HL, Wang CP, Zhao GS. M¨obius isoparametric hypersurfaces in S n+1 with two distinct principal curvatures. Acta Math Sinica (Engl Ser) 2002; 18: 437-446.
  • [13] Li HZ, Wang CP. M¨obius geometry of hypersurfaces with constant mean curvature and scalar curvature. Manuscripta Math 2003; 112: 1-13.
  • [14] Li TZ, Ma X, Wang CP. Wintgen ideal submanifolds with a low-dimensional integrable distribution. Front Math China 2015; 10: 111-136.
  • [15] Li TZ, Qing J, Wang CP. M¨obius curvature, Laguerre curvature and Dupin hypersurface. Adv Math 2017; 311: 249-294.
  • [16] Li TZ, Wang CP. A note on Blaschke isoparametric hypersurfaces. Int J Math 2014; 25: 1450117.
  • [17] Li XX, Peng YJ. Classification of the Blaschke isoparametric hypersurfaces with three distinct Blaschke eigenvalues. Results Math 2010; 58: 145-172.
  • [18] Li XX, Zhang FY. A classification of immersed hypersurfaces in spheres with parallel Blaschke tensor. Tohoku Math J 2006; 58: 581-597.
  • [19] Li XX, Zhang FY. Immersed hypersurfaces in the unit sphere S n+1 with constant Blaschke eigenvalues. Acta Math. Sinica (Engl Ser) 2007; 23: 533-548.
  • [20] Li XX, Zhang FY. On the Blaschke isoparametric hypersurfaces in the unit sphere. Acta Math Sinica (Engl Ser) 2009; 25: 657-678.
  • [21] Liu HL, Wang CP, Zhao GS. M¨obius isotropic submanifolds in S n . Tohoku Math J 2001; 53: 553-569.
  • [22] Wang CP. M¨obius geometry of submanifolds in S n . Manuscripta Math 1998; 96: 517-534.
  • [23] Xia QL. A note on the M¨obius geometry of hypersurfaces with constant mean curvatureand scalar curvature. Adv Math (China) (in Chinese) 2006; 35: 677-684.
  • [24] Zhai SJ, Hu ZJ, Wang CP. On submanifolds with parallel M¨obius second fundamental form in the unit sphere. Int J Math 2014; 25: 1450062.
  • [25] Zhang TF. The hypersurfaces with parallel M¨obius form in S n+1 . Adv Math (China) (in Chinese) 2003; 32: 230-238.
  • [26] Zhong DX, Sun HA. The hypersurfaces in the unit sphere with constant para-Blaschke eigenvalues. Acta Math Sinica (Chin Ser) 2008; 51: 579-592.