عنوان	WEAK AMENABILITY OF ULTRAPOWERS OF BANACH ALGEBRAS
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Ultrapower, ultra-weak amenability, ultra-amenability
چکیده	We study when weak amenability of Banach algebras are stable under the ultrapower constructions. We extend some general results of weak amenability of Banach algebras to their ultrapowers. A Banach algebra A is ultra-weakly amenable, if every ultrapower of it is weakly amenable. We further investigate the relationship between ultra-weak amenability, (weak)amenability, and ultra-amenability. We provide an example of an ultra-weakly amenable Banach algebra that is not amenable and vice versa.
پژوهشگران	وانیا خداکرمی (نفر اول)، اسمعیل فیضی (نفر دوم)