Dr. László Tóth is a full professor, vice-dean and head of the Department of Mathematics at the Institute of Mathematics and Informatics of the University of Pécs, Hungary. His research is centred on analytic and multiplicative number theory, with extensive work on arithmetic functions, Ramanujan sums, cyclotomic polynomials and the enumeration of subgroups of finite abelian groups. Research Interests Multiplicative and additive arithmetic functions and their asymptotic behaviour Dirichlet series, Ramanujan expansions and related identities Generalised cyclotomic polynomials and unitary divisors GCD–LCM sums and their applications in number theory Subgroup counting in finite abelian groups and ring-theoretic enumeration Combinatorial and probabilistic aspects of coprimality conditions Across more than 100 refereed papers he has systematically developed identities, asymptotic formulas and enumeration techniques that link classical multiplicative number theory with modern algebraic and combinatorial questions. His 2023–2025 articles continue this programme, treating odd perfect-number analogues, hyperbolic summation methods, multidimensional density questions and refined estimates for divisor-type sums. Scientific Awards & Recognition No awards listed in the provided text. Students & Mentoring No students or advisees are named in the provided text. Laboratories & Teams As head of the Department of Mathematics at the Institute of Mathematics and Informatics, University of Pécs, he leads a research group focused on analytic and combinatorial number theory, fostering collaboration on arithmetic functions and algebraic enumeration problems.

