Kusherbayeva У., & Altynbek, C. (2024). ON THE INITIAL BOUNDARY VALUE PROBLEM FOR THE BELTRAMI EQUATION WITH POLAR SINGULARITY IN AN UNBOUNDED REGION. Bulletin of Abai KazNPU. Series of Physical and Mathematical Sciences, 86(2), 65–73. https://doi.org/10.51889/2959-5894.2024.86.2.006