scholarly journals Moment Problems in Hereditary Function Spaces

2019 ◽  
Vol 6 (1) ◽  
pp. 64-75
Author(s):  
Florian-Horia Vasilescu

Abstract We introduce a concept of hereditary set of multi-indices, and consider vector spaces of functions generated by families associated to such sets of multi-indices, called hereditary function spaces. Existence and uniquenes of representing measures for some abstract truncated moment problems are investigated in this framework, by adapting the concept of idempotent and that of dimensional stability, and using some techniques involving C*-algebras and commuting self-adjoint multiplication operators.

2020 ◽  
Vol 36 (2) ◽  
pp. 277-286
Author(s):  
MOHAMED AMINE KHAMSI ◽  
◽  
POOM KUMAM ◽  
UMAR BATSARI YUSUF ◽  
◽  
...  

Recently, researchers are showing more interest on both modular vector spaces and modular function spaces. Looking at the number of results it is pertinent to say that, exploration in this direction especially in the area of fixed point theory and applications is still ongoing, many good results can still be unveiled. As a contribution from our part, we study some fixed point results in modular vector spaces associated with order relation. As an application, we were able to study the existence of fixed point(s) of both depolarizing quantum operation and Markov operators through modular functions/modular spaces. The awareness on the importance of quantum theory and Economics globally were the sole motivations of the application choices in our work. Our work complement the existing results. In fact, it adds to the number of application areas that modular vector/function spaces covered.


2013 ◽  
Vol 33 (5) ◽  
pp. 1463-1470 ◽  
Author(s):  
B. YOUSEFI ◽  
Sh. KHOSHDEL ◽  
Y. JAHANSHAHI

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