Volume 13, Issue 4 Sin-Ei Takahasi John M. Rassias Saburou Saitoh Yasuji Takahashi Refined generalizations of the triangle inequality on Banach spaces Downloads Abstract PDF Full article PDF DOI { copied = true; setTimeout(() => copied = false, 2000) })" :aria-label="copied ? 'DOI copied' : 'Copy DOI'" :title="copied ? 'Copied' : 'Copy DOI'" > Find all available articles from these authors Sin-Ei Takahasi John M. Rassias Saburou Saitoh Yasuji Takahashi Find more articles with the same keywords inequalities triangle inequalities Banach spaces Euler-Lagrange type identity Hua's inequality Find more articles with the same subject classes 26D15 26D20