المصدر: ياريت حد يساعدني ل برهان هذا السؤل بالتحليل الحقيقي ^_~ في منتدى : قسم الرياضيات Prove that if the seq. Xn and Yn ,then: limit inferior of Xn+limit inferior Yn is less than limit inferior(Xn+Yn)is less than limit superior Xn+limit inferior is less than limit superior (Xn+Yn) is less than limit superior Xn +limit superior Yn proivided that no sum is of the form infinity or minus infinity and show that inequality may be strict could any one solve this ?????????/ ^_~