Karsli H. Historical Backround of wavelets and orthonormal systems: Recent results on positive linear operators reconstructed via wavelets: Recent results on positive linear operators reconstructed via wavelets. Modern Math. Methods [Internet]. 2024 Dec. 8 [cited 2025 Jan. 20];2(3):132-54. Available from: https://modernmathmeth.com/index.php/pub/article/view/44