@inproceedings{paperid:1020954, author = {Dadipour, Farzad and Sal Moslehian, Mohammad}, title = {A new characterization of inner product spaces}, booktitle = {چهل و یکمین کنفرانس ریاضی کشور}, year = {2010}, location = {ارومیه, IRAN}, keywords = {inner product space; characterization of inner product spaces; $p$-angular distance}, }