Modified Method for the Solution of Dual Trigonometric Series Relations

  • A. Choudhary
  • S. C. MarthaEmail author
  • A. Chakrabarti
Research Article


Two basic dual trigonometric series relations involving a countable infinite number of unknowns are considered for the determination of the unknowns. The numerical values of the unknowns are determined with the help of the methods of algebraic least-squares approximation and singular value decomposition. The dual trigonometric series and the corresponding functions are compared with the existing results. The errors are also computed to show the efficiency of these methods. The study indicates that the method of algebraic least squares is more straightforward, simpler and computationally more efficient as compared to the available methods.


Dual trigonometric series Overdetermined system Algebraic least-squares approximation Singular value decomposition method 

Mathematics Subject Classification

65F20 93E24 



The first author is grateful to the University Grants Commission (UGC), Government of India, for providing the research fellowship for pursuing PhD degree at the Indian Institute of Technology Ropar, India. The second author is grateful to the Department of Science and Technology, Government of India, for financial funding under Grant Number SB/FTP/MS-034/2013. The third author is thankful to NASI for financial support as a Senior Scientist Platinum Jubilee Fellow.


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Copyright information

© The National Academy of Sciences, India 2019

Authors and Affiliations

  1. 1.Department of MathematicsIndian Institute of Technology RoparPunjabIndia
  2. 2.Department of MathematicsIndian Institute of ScienceBangaloreIndia

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