scholarly journals A characterization of inner product spaces related to the skew-angular distance

2013 ◽  
Vol 93 (3-4) ◽  
pp. 556-560 ◽  
Author(s):  
H. Dehghan
Keyword(s):  
Angular Distance ◽  
Inner Product ◽  
Product Spaces ◽  
Inner Product Spaces

A characterization of inner product spaces based on a property of height's transformation

1993 ◽  
Vol 61 (6) ◽  
pp. 560-566 ◽  
Author(s):  
C. Alsina ◽  
P. Guijarro ◽  
M. S. Tom�s
Keyword(s):  
Inner Product ◽  
Product Spaces ◽  
Inner Product Spaces

scholarly journals Hyperstability of the Fréchet Equation and a Characterization of Inner Product Spaces

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Anna Bahyrycz ◽  
Janusz Brzdęk ◽  
Magdalena Piszczek ◽  
Justyna Sikorska
Keyword(s):  
Fixed Point ◽  
Fixed Point Theorem ◽  
Point Theorem ◽  
Main Tool ◽  
Inner Product ◽  
Product Spaces ◽  
Inner Product Spaces ◽  
Fréchet Equation ◽  
New Inequalities

We prove some stability and hyperstability results for the well-known Fréchet equation stemming from one of the characterizations of the inner product spaces. As the main tool, we use a fixed point theorem for the function spaces. We finish the paper with some new inequalities characterizing the inner product spaces.

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