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Unformatted text preview: g explanation. Figure 2; Visualisation of the geometric object studied 4.1. Internal representation of the object Tensor modelling applied to the initial object enables the angle specification model to be obtained, which is the initial metric tensor, called Ginit . This defines a vectoral space for the sheaf of vectors E useful in the representation of the specifications covered in this paragraph. ur uu uu uu uu uu uu r rrrrrr Here, E = n1 , n2 , n3 , n4 , n5 , n6 , n7 , l1 , with the following convention: the normal to plane r ni is called ni and the director vector of the axis of the l1 cylinder is called l1 . ( ur ) The values of the angles between the vectors, measured on the initial object, are noted in the table below. 32
0° sym. sym. sym. sym. sym. sym. sym. P. Serré A. Rivière and A. Clé , ment
Table 1: Initial values of angles (in °) uu r uu r uu r uu r uu r
40° 0° sym. sym. sym. sym. sym. sym. angle ur n1 uu r n2 uu r n3 uu r n4 uu r n5 uu r n6 uu r n7 r l1 n3...
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