## Normal structure $$f$$ satisfying $$f^ 3 +f = 0$$.(English)Zbl 0136.18302

### Keywords:

Riemannian manifolds
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### References:

 [1] DOMBROWSKI, P., On the geometry of the tangent bundle. J. Reine u. ngew. Math. 210 (1962), 73-88. · Zbl 0105.16002 [2] ISHIHARA, S., AND K. YANO, On integrability of a structure / satisfying /3+/=0 Quart. J. Math. Oxford (2), 15 (1964), 217-222. · Zbl 0173.23605 [3] NAKAGAWA, H., /-structures induced on submanifolds in spaces, almost Hermitia or Kaehlerian. To appear in Kdai Math. Sem. Rep. 18 (1966). · Zbl 0146.17801 [4] SASAKI, S., AND Y. HATAKEYAMA, On differentiate manifolds with certain struc ture which are closely related to almost contact structure, II. Thoku Math. J. 13 (1961), 281-294. · Zbl 0112.14002 [5] TACHIBANA, S., AND M. OKUMURA, On the almost-complex structure of tangen bundles of Riemannian spaces. Thoku Math. J. 14 (1962), 156-161. · Zbl 0114.38003 [6] YANO, K., On structure/ satisfying /s+/=0. Tech. Rep., No.2, June 20 (1961), Univ. of Washington [7] YANO, K., On a structure defined by a tensor field / of type (1, 1) satisfyin / 3 + / = 0 .Tensor, N. S., 14 (1963), 99-109. · Zbl 0122.40705 [8] YANO, K., AND S. ISHIHARA, The /-structure induced on submanifolds of comple and almost complex spaces. To appear in Kdai Math. Sem. Rep. 18 (1966). · Zbl 0161.41203 [9] YANO, K., AND A. J. LEDGER, Linear connections of tangent bundles. J. Londo Math. Soc. 39 (1964), 495-500. · Zbl 0126.38301
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