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On - -irresolute functions and --continuous functions in Topological spaces
N.Kalaivani,D. SARAVANAKUMAR,G. SAI SUNDARA KRISHNAN 장전수학회 2012 Proceedings of the Jangjeon mathematical society Vol.15 No.4
In this paper the notion of --irresolute functions in a topological space has been introduced and some of their properties are studied. Further the concept of -- continuous functions, --open functions and --closed functions have been introduced and the relationship among them are studied.
A Neelaveni,K Senthil,R Kalaivani,B Nalini,N Sivakumar 한국물리학회 2023 Current Applied Physics Vol.55 No.-
In this work, we attempt to incorporate two Na atoms into the NaVOPO4 matrix, which transforms the matrix into Na2VOPO4. To achieve this, we adjusted the phase parameters and used a facile synthesis method like the sol-gel-assisted hydrothermal technique. However, at high temperatures, the oxygen environment around the V atom changes, introducing the new phase Na2V(PO4)2 matrix into NaVOPO4. High valence state ions are required to support the active sites, keep the oxygen environment around them at a high temperature, and function well as a dopant for the NVP matrix. As a result, the Zr4+ is incorporated into the NVP matrix and it significantly enhances the tetragonal phases by enhancing (101), (112) planes. By substituting Zr4+ ion, the specific capacity of NVP is raised from 0.8268 mAh/g to 4.214 mAh/g at the scan rate of 10 mV/s.