Dikran Dikranjan is an Associate Professor in the Dipartimento di Matematica e Informatica, Università di Udine, Italy. He is the author or coauthor of over 90 research papers and books on topological groups, modules and rings, and category theory and its applications, including Topological Groups: Characters, Dualities, and Minimal Group Topologies (Marcel Dekker, Inc.). A member of the Italian Mathematical Union, Dr. Dikranjan received the Ph.D. degree (1978) in mathematics from Sofia University, Bulgaria. Luigi Salce is a Professor in the Dipartimento di Matematica Pura ed Applicata, Università di Padova, Italy. He is the author, coauthor, editor, or coeditor of over 50 papers and books on abelian groups and module theory, including Modules Over Valuation Domains (Marcel Dekker, Inc.). A member of the Italian Mathematical Union, Dr. Salce received the doctoral degree (1969) in mathematics from the Università di Padova, Italy.

• Preface, Contributors, Participants to the Conference, Adalberto Orsatti’s Contributions to Mathematics, Adalberto Orsatti’s Contribution to Abelian Group Theory, Orsatti’s Contribution to Module Theory, Orsatti’s Contribution to Topological Albegra, List of Adalberto Orsatti’s Publications, Research Articles, Global Krull Dimension and Global Dual Krull Dimension of Valuation Rings, The Lüroth’s Theorem for Some Complete Valued Fields, AB-5* for Module and Ring Extensions, K0 of Semiartinian Unit-Regular Rings, Idempotents of the Class Semigroup of a Prüfer Domain of Finite Character, Greatest Common Divisors Generalized, On a Problem of Prof. A. Orsatti, Subgroups of the Baer–Specker Group with Prescribed Endomorphism Ring and Large Dual, Isomorphic Automorphism Groups of Torsion-Free p-adic Modules, Strongly Graded Coalgebras and Crossed Coproducts, A Theorem on Extensions of Bimodules, Commutative Rings with Acc on Irreducible Ideals, Self Linearly Compact Rings and Dualities, Extensions of Compact Abelian Groups by Discrete Ones and Their Duality Theory, II, A Note on Quasi-Duality, Endomorphism Rings of Modules Whose Cardinality Is Cofinal to Omega, Endomorphism Rings and Automorphism Groups of Separable Torsion-Free Modules over Valuation Domains, Torsionless Modules and Rings with Finite Essential Socle, Building Noetherian Domains Inside an Ideal-adic Completion, G-Minimal Topological Groups, An Adjointness Relation for Finite Partition Lattices, N-Exchange Rings, The Variety of Topological Groups Generated by the Class of All Banach Spaces, On Thin Generating Sets in Topological Groups, Abelian Topological Groups without Irreducible Banach Representations, Cyclic Modules over End(VD) Whose Endomorphism Ring Is an Ultrapower of D, Criteria of Steadiness, Automorphisms Which Determine an Abelian p-Group, Dualities and Pure Semisimple Rings, Suitable Sets in Products of Topological Groups and in Groups Equipped with the Bohr Topology, On a Duality with “Less than Usual” Reflexive Abstract Modules, The Roelcke Compactification of Unitary Groups, Tilting in Module Categories