TI - On Two Methods for Computing the Non-Rigid Group of Molecules PT - JOURNAL ARTICLE TA - IJMSI JN - IJMSI VO - 3 VI - 2 IP - 2 4099 - http://ijmsi.ir/article-1-53-en.html 4100 - http://ijmsi.ir/article-1-53-en.pdf SO - IJMSI 2 ABĀ  - In this paper, two methods are described, by means of which it is possible to calculate the non rigid group of molecules consisting of a number of XH3 groups attached to a rigid framework. The first method is a combination of the wreath product formalism of Balasubramanian and modern computer algebra and the second method is a computational approach by using group theory package GAP. We apply these methods on 2,3,6,7,10,11-hexanitrotriphenylene (HNT) to compute its non-rigid group. CP - IRAN IN - LG - eng PB - IJMSI PG - 21 PT - Research paper YR - 2008