Multiresolution geometric models support the representation and processing of geometric entities at di erent levels of resolution, and are useful in several application elds, such as geographic information systems, CAD systems and scienti c visualization. The aim of this paper is to provide a systematic framework for multiresolution geometric modeling, independent both of the dimension of spati...

Ab initio calculations at HF/6-31G* level of theory for geometry optimization and MP2/6-31G*//HF/6-31G* for a single point total energy calculation are reported for the importantenergy-minimum conformations and transition-state geometries of 1, 3-diazacyclohepta-1, 2-diene (2) and 1, 3-diazacycloocta-1, 2-diene (3). The C2 symmetric twist-chair (2-TC)conformation of 2 is calculated to be 7.4 kJ...