Arystangalikyzy A, Zhubanysheva A. OPTIMAL APPROXIMATION OF SOLUTIONS OF POISSON EQUATIONS BY INITIAL DATA IN THE FORM OF ACCURATE AND INACCURATE INFORMATION OF TRIGONOMETRIC FOURIER COEFFICIENTS. JMMCS [Internet]. 2025 Sep. 29 [cited 2025 Oct. 9];127(3). Available from: https://bm.kaznu.kz/index.php/kaznu/article/view/1698