We introduce an extended model for view-centric reasoning, EVCR, that provides more comprehensive and flexible abstractions for representing actual concurrency. The theory of Communicating Sequential Processes (CSP) provides an interleaved semantics for reasoning about concurrency through a sequentialized trace of events recorded by an idealized observer. The theory of View-Centric Reasoning (V...

The theory of cut-free sequent proofs has been used to motivate and justify the design of a number of logic programming languages. Two such languages, λProlog and its linear logic refinement, Lolli [15], provide for various forms of abstraction (modules, abstract data types, and higher-order programming) but lack primitives for concurrency. The logic programming language, LO (Linear Objects) [2...

Linear logic has long been heralded for its potential of providing a logical basis for concurrency. While over the years many research attempts were made in this regard, a Curry-Howard correspondence between linear logic and concurrent computation was only found recently, bridging the proof theory of linear logic and session-typed process calculus. Building upon this work, we have developed the...

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Concurrency control is the activity of synchronizing database operations by concurrently executing transactions on a shared database. We examine the problem of concurrency control when the database supports multiple versions of the data. Multiversion concurrency control is used in order to improve the level of achievable concurrency. The goal is to produce an execution that has the same effect ...

The international Conference on Concurrency Theory (CONCUR), which was launched in 1990 by the eponymous ESPRIT BRA project, reached an important milestone in 2015: its quarter of a century. The event was celebrated twice: first during the 25th edition of the conference, held in Rome in September 2014, and then during its 26th edition, held in Madrid in September 2015, which actually marked CON...

Concurrency control is the activity of synchronizing database operations by concurrently executing transactions on a shared database. We examine the problem of concurrency control when the database supports multiple versions of the data. Multiversion concurrency control is used in order to improve the level of achievable concurrency. The goal is to produce an execution that has the same effect ...

Sesqui-pushout (SqPO) rewriting along non-linear rules and for monic matches is well-known to permit the modeling of fusing cloning vertices edges, yet date, no construction a suitable concurrency theorem was available. The lack such theorem, in turn, rendered compositional reasoning systems largely infeasible. We develop this paper SqPO-rewriting categories that are quasi-topoi (subsuming exam...

Current metamodeling techniques can be used to specify the syntax and semantics of domain specific modeling languages (DSMLs). Still, there is little support for explicitly specifying concurrency semantics of DSMLs. Often, such semantics are provided by the implicit concurrency model of the execution environment supported by the language workbench used to implement the DSMLs. The lack of an exp...