KUWAIT JOURNAL OF SCIENCE & ENGINEERING, cilt.36, ss.1-14, 2009 (SCI-Expanded)
In this study, we first defined the dual-split quaternions as semi-dual space 4/2, then we gave the Serret-Frenet formulas for dual-split quaternionic curves. We also defined semi-dual quaternionic curves in semi-dual spaces 3/1 and 4/2 and finally, we gave the Serret-Frenet formulas for semi-dual quaternionic curves in those spaces.