Md. Shahjahan Ali  , Md.Rezaul Karim  , 
    Characterizations of Inner Product Spaces in Terms of Normed Linear Spaces,
    Asian Journal of Information Technology,
    Volume 4,Issue 7,
    2005,
    Pages 711-714,
    ISSN 1682-3915,
    ajit.2005.711.714,
    (https://makhillpublications.co/view-article.php?doi=ajit.2005.711.714)
    Abstract: The great-celebrated theorem due to Jordan and Von-Neumann had revealed that an inner product could be obtained from a norm provided the norm satisfies the parallelogram law. We have also studied some other related theorems and corollaries deduced from Jordan and Von-Neumann.
    Keywords: Characterization;Inner product;parallelogram law