Henri Veysseyre

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Our previous paper emphasized a method for obtaining the crystallographic point groups of five-dimensional space, i.e. the subgroups of the crystal family holohedries. Moreover, it recalled the names of the crystal families and the symbols of their holohedries. These results being obtained, this paper gives a geometrical symbol to each of these point groups(More)
The purpose of this work is to introduce a method with a view to obtaining the crystallographic point groups of five-dimensional space, i.e. the subgroups of the holohedries of these space crystal families. This paper is specifically devoted to numerical analysis, whereas the following ones deal with some applications to crystallography. These results have(More)
This paper describes three methods to calculate the number of types of crystallographic Point Symmetry Operations (crPSOs for short) in a space of any finite dimension. We begin our presentation by recalling some properties of Point Operations: •crystallographic restrictions, •relation between the number of types of positive (crPSO+) and negative (crPSO−)(More)
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