journal6 ›› 2013, Vol. 34 ›› Issue (1): 6-10.DOI: 10.3969/j.issn.1007-2985.2013.01.002

• Mathematics • Previous Articles     Next Articles

Properties  of Extreme Value and Extreme Value Tangent Vector of Normal Curvature on Surface


  1. (Department of Mathematics,LMIB of the Ministry of Education,Beihang University,Beijing 100191,China)
  • Online:2013-01-25 Published:2013-01-22

Abstract: The direct method of finding the extreme value of normal curvature and the extreme value vector are considered.A direct derivation method is proposed,and its properties as matrix characteristic value and characteristic vector are obtained.

Key words: extreme value of normal curvature, extreme value tangent vector, characteristic value, characteristic vector, conjugate and orthogonal tangent vector;Euler&rsquo, s formula of normal curvature

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