On 1 w + 1 x + 1 y + 1 z = 1 2 $\frac{1}{w} + \frac{1}{x} + \frac{1}{y} + \frac{1}{z} = \frac{1}{ 2} $ and some of its generalizations
Crossref DOI link: https://doi.org/10.1186/s13660-018-1782-z
Published Online: 2018-07-28
Published Print: 2018-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Bai, Tingting
Text and Data Mining valid from 2018-07-28
Article History
Received: 8 May 2018
Accepted: 18 July 2018
First Online: 28 July 2018
Competing interests
: The author declares that there are no competing interests.