عنوان Additive Maps Preserving the Essential Points Between Weak Hypervector Spaces نوع پژوهش مقاله چاپ شده کلیدواژهها Essential point; Regular linear operator; Weak hypervector space. چکیده In this paper, we introduce the concept of regular linear operators. We prove that the regular linear operators preserve the normality, linear independence and dimension of weak hypervector spaces and prove some important results. پژوهشگران روجا حسین زاده (نفر دوم)، اعظم مقسومی (نفر سوم)، علی تقوی (نفر اول)