IJSRP, Volume 4, Issue 7, July 2014 Edition [ISSN 2250-3153]
Aymen . A . Ahmed Imam, Mohammed Ali Bshir, Emad eldeen A . A . Rahim
This paper put a new mathematical system (stacked system) interested in arranging elements in a manner simple analytical set (according to the importance of the element in the set) and to prove that this system is a semi-group and prove some properties of semi-groups in this system.