Khazar University Mathematics Department professor Bilander Allahverdiyev's first co-authored article entitled "Hahn multiplicative calculus" was published in "Le Matematiche" journal (2022, Vol. 77; No. 2). Note that "Le Matematiche" journal is indexed in Web of Science and Scopus databases.
In this paper, Hahn multiplicative calculus was introduced and as an application of this subject, the classical Sturm-Liouville problem was examined under this structure.
https://lematematiche.dmi.unict.it/index.php/lematematiche/issue/view/86