Dr Robert Jan van Glabbeek
Rob van Glabbeek has a strong international reputation in the study of the theory of concurrent computation, having made particular contributions to the conciliation of the interleaving and the true concurrency communities by codeveloping the current view of branching time and causality as orthogonal but interacting dimensions of concurrency. He condensed many divergent views on semantic equivalences into the linear time- branching time spectrum. The resulting publications are required...
Rob van Glabbeek has a strong international reputation in the study of the theory of concurrent computation, having made particular contributions to the conciliation of the interleaving and the true concurrency communities by codeveloping the current view of branching time and causality as orthogonal but interacting dimensions of concurrency. He condensed many divergent views on semantic equivalences into the linear time- branching time spectrum. The resulting publications are required reading in the graduate programs of several universities. Together with Peter Weijland he invented the notion of branching bisimulation, that since has become the prototypical example of a branching time equivalence, and the semantic equivalence used in most verification tools based on equivalence checking. With Ursula Goltz he proposed the notion of action refinement as a useful tool for evaluating semantic equivalences and implementation relations. This gave rise to a wave of publications, including a dozen Ph.D. theses. With Peter Rittgen he initiated the application of process algebraic methods in the formal description and analysis of economic production processes. As consultant for Ricoh innovations he contributed to the practical application of concurrency-theoretic ideas in workflow management. With Dominic Hughes he made a crucial contribution to the proof theory of linear logic by proposing a notion of proof net that had been sought after in vain by linear logicians since the inception of linear logic. Together with Vaughan Pratt he initiated the now widespread use of higher dimensional automata and other geometric models of concurrency. With Gordon Plotkin he integrated various causality respecting models of concurrency, including Petri nets, event structures and propositional theories. With Wan Fokkink he used results from unification theory and from modal logic to obtain compositionality results in structural operational semantics. In 2007, in cooperation with Yuxin Deng, Matthew Hennessy, Carroll Morgan and Chenyi Zhang, he characterised the may- and must-testing preorders for processes with probabilistic and nondeterministic choice, thereby solving a problem that was posed in 1992 and has remained open ever since. ogether with Bas Ploeger, he showed that the leading algorithm for determining whether a program (abstractly represented as a transition system) correctly simulates another such program, is based on a fixed point theory that is irreparably flawed; and repaired the algorithm in a way that bypasses this fixed point theory. Together with NICTA colleagues Peter Höfner, Annabelle MvIver, Ansgar Fehnker, Marius Portman and Wee Lum Tan, he developed a new process algebra for wireless mesh networks and used it to obtain the first rigorous formalisation of the specification of the popular Ad-hoc On-demand Distance Vector (AODV) routing protocol. This revealed that under a plausible interpretation of the original specification of AODV, the protocol does admit routing loops; this is in direct contradiction with popular belief, the promises of the AODV specification, and the main paper on AODV (with 13000 citations). The NICTA team also proved loop-freedom of AODV under a subtly different interpretation of the original specification. Together with Ursula Goltz and Jens Schicke-Uffmann, he gave a precise characterisation of the class of concurrent systems, modelled as plain Petri nets, that, without making concessions on branching time behaviour, concurrency or divergence, cannot be implemented in a distributed way using only asynchronous communication. Together with Peter Höfner he formalised justness, an assumption in between progress and fairness, that is crucial for proving liveness properties of distributed system. Justness was shown to coincide with weak fairness under a novel formulation of what it means for an action to be perpetually enabled, although it differs under the standard formalisation of this concept. In 2015, also jointly with Peter Höfner, he established that fair schedulers, as frequently occur in network routers and operating systems, cannot be rendered in standard process algebras like CCS, at least not without resorting to fairness assumptions. For this type of application, mild extensions of CCS are called for.
In addition, he has organised workshops on combining compositionality and concurrency, on logic, language and information, on the Unified Modelling Language, on workflow management, web services and business process modelling, on automatic and semi-automatic system verification, on structural operational semantics, and on formal methods for embedded systems.
He is editor-in-chief of Electronic Proceedings in Theoretical Computer Science, a member of the editorial boards of Information and Computation and Theoretical Computer Science, and has been on several dozen program committees.
Rob van Glabbeek has been active as a research scientist in the field of Formal Methods since 1984, of which five years were spent at CWI in Amsterdam and twelve years at Stanford University. In addition he has had visiting appointments at the Technical University of Munich, GMD in Bonn, INRIA in Sophia Antipolis, the University of Edinburgh, the University of Cambridge, and l’Université de la Méditerranée in Marseilles. He has also been active as a consultant for Ricoh Innovations, California, in the area of workflow modelling.
Since 2004 he worked for NICTA, Sydney, Australia, until that research institute merged into Data61, CSIRO, on 1 July 2016. Since then he is Chief Research Scientist at Data61, CSIRO in Sydney. Additionally, he is Conjoint Professor at the School of Computer Science and Engineering at the University of New South Wales, and a Research Affiliate at the Concurrency Group in the Computer Science Department of Stanford University.
Rob van Glabbeek earned his Masters degree in Mathematics (cum laude) from the University of Leiden, and a PhD from the Free University in Amsterdam. His thesis was entitled Comparative concurrency semantics and refinement of actions.
Professor van Glabbeek’s research interests include: models of concurrency, process algebra, mesh network protocols, compositional implementation relations, structural operational semantics, proof nets for linear logic, temporal logic, synchronous versus asynchronous communication in distributed systems, and building a theory of processes with probabilities and nondeterminism.
Professor van Glabbeek maintains close ties with the concurrency group at Stanford University and the Laboratory for Foundations of Computer Science at the University of Edinburgh. His work on proof nets and on concurrency modelling is to a large extent in cooperation with these groups. Van Glabbeek also participates in research activities in process algebra and structural operational semantics that span many European sites, including Eindhoven University of Technology, the Free University in Amsterdam, the University of Sussex and Trinity College, Dublin. His work on synchronous versus asynchronous communication is in cooperation with Professor Goltz at the University of Braunschweig.