This Festschrift volume, dedicated to Jifeng He on the occasion of his 80th birthday, includes refereed papers by leading researchers, many of them current and former colleagues, presented at a dedicated celebration in the Shanghai Science Hall in September 2023. Jifeng was an important researcher on the European ESPRIT ProCoS project and the Working Group on Provably Correct Systems, subsequently he collaborated with Tony Hoare on Unifying Theories of Programming. Jifeng returned to China in 1998, first to the United Nations University in Macau and then to the East China Normal University in Shanghai. He has since founded an Artificial Intelligence research institute that focuses on the application of technology in large-scale industrial software systems. His scientific contributions have been recognized through his election to membership of the Chinese Academy of Sciences. The first paper in the volume provides an overview of Jifeng’s research contributions, especially in the area of formal methods, and the following two papers detail developments in UTP and rCOS (refinement calculus of object systems). In the next two sections of the book, the editors included papers by colleagues and coauthors of Jifeng while he was at the University of Oxford and engaged with the European ProCoS project. The section that follows includes papers authored by colleagues from his later research in China and Europe. The final section includes a paper related to Jifeng’s recent roadmap for UTP.

This volume contains a record of some of the lectures and seminars delivered at the Third International School on Engineering Trustworthy Software Systems (SETSS 2017), held in April 2017 at Southwest University in Chongqing, China. The six contributions included in this volume provide an overview of leading-edge research in methods and tools for use in computer system engineering. They have been distilled from six original courses delivered at the school on topics such as: rely/guarantee thinking; Hoare-style specification and verification of object-oriented programs with JML; logic, specification, verification, and interactive proof; software model checking with Automizer; writing programs and proofs; engineering self-adaptive software-intensive systems; and with an additional contribution on the challenges for formal semantic description. The material is useful for postgraduate students, researchers, academics, and industrial engineers, who are interested in the theory and practice of methods and tools for the design and programming of trustworthy software systems.

The Formal Aspects of Computing Science (FACS) Specialist Group of the British Computer Society set up a seriesof evening seminarsin 2005to report on advances in the application of formal design and analysis techniques in all the stages of software development. The seminars attracted an audience fromboth academiaand industry, andgavethem the opportunity to hear and meet pioneers andkeyresearchersin computing science.Normally it wouldbe necessaryto travelabroadand attend an internationalconference to be in the presence of such respected ?gures; instead, the evening seminar programme, overa period of threeyears,broughtthe keynotespeakers of the conference to theBritishComputerSocietyheadquarters,fortheconvenienceofanaudience basedinLondon.Severalspeakersfromtheperiod2005-2007kindlydeveloped their talks into full papers, which form the basis of this volume. Iamdelightedtowelcomethepublicationofsuchanexcellentandcomp- hensiveseriesofcontributions.Theyarenowavailableinbookformtoaneven wider audience, including developers interested in solutions already available, and researchers interested in problems which remain for future solution. Sir Tony Hoare Preface They envy the distinction I have won; let them therefore, envy my toils, my honesty, and the methods by which I gained it. - Sallust (86-34 BC) Formalmethods area powerfultechniqueforhelping toensure the correctness of software. The growth in their use has been slow but steady and they are typically applied in critical systems where safety or security is paramount.

Presenting the latest technological developments in arts and culture, this volume demonstrates the advantages of a union between art and science. Electronic Visualisation in Arts and Culture is presented in five parts: Imaging and Culture New Art Practice Seeing Motion Interaction and Interfaces Visualising Heritage Electronic Visualisation in Arts and Culture explores a variety of new theory and technologies, including devices and techniques for motion capture for music and performance, advanced photographic techniques, computer generated images derived from different sources, game engine software, airflow to capture the motions of bird flight and low-altitude imagery from airborne devices. The international authors of this book are practising experts from universities, art practices and organisations, research centres and independent research. They describe electronic visualisation used for such diverse aspects of culture as airborne imagery, computer generated art based on the autoimmune system, motion capture for music and for sign language, the visualisation of time and the long term preservation of these materials. Selected from the EVA London conferences from 2009-2012, held in association with the Computer Arts Society of the British Computer Society, the authors have reviewed, extended and fully updated their work for this state-of-the-art volume.

The Formal Aspects of Computing Science (FACS) Specialist Group of the British Computer Society set up a seriesof evening seminarsin 2005to report on advances in the application of formal design and analysis techniques in all the stages of software development. The seminars attracted an audience fromboth academiaand industry, andgavethem the opportunity to hear and meet pioneers andkeyresearchersin computing science.Normally it wouldbe necessaryto travelabroadand attend an internationalconference to be in the presence of such respected ?gures; instead, the evening seminar programme, overa period of threeyears, broughtthe keynotespeakers of the conference to theBritishComputerSocietyheadquarters, fortheconvenienceofanaudience basedinLondon.Severalspeakersfromtheperiod2005-2007kindlydeveloped their talks into full papers, which form the basis of this volume. Iamdelightedtowelcomethepublicationofsuchanexcellentandcomp- hensiveseriesofcontributions.Theyarenowavailableinbookformtoaneven wider audience, including developers interested in solutions already available, and researchers interested in problems which remain for future solution. Sir Tony Hoare Preface They envy the distinction I have won; let them therefore, envy my toils, my honesty, and the methods by which I gained it. - Sallust (86-34 BC) Formalmethods area powerfultechniqueforhelping toensure the correctness of software. The growth in their use has been slow but steady and they are typically applied in critical systems where safety or security is paramoun

This book constitutes the refereed proceedings of the First International Conference of Abstract State Machines, B and Z, ABZ 2008, held in London, UK, in September 2008. The conference simultaneously incorporated the 15th International ASM Workshop, the 17th International Conference of Z Users and the 8th International Conference on the B Method.

The 44 revised full papers presented together with 4 invited contributions were carefully reviewed and selected from numerous submissions. The conference fosters the cross-fertilization of three rigorous methods for the design and analysis of hardware and software systems - both in academia and industry - namely Abstract State Machines, B, and Z. Covering a wide range of research spanning from theoretical and methodological foundations to tool support and practical applications, the contributions are organized in topical sections on abstract state machines, B papers, Z papers, ABZ short papers, and the papers of the Verified Software Repository Network (VSR-net) workshop.

This book constitutes the thoroughly refereed and peer-reviewed outcome of the Formal Methods and Testing (FORTEST) network - formed as a network established under UK EPSRC funding that investigated the relationships between formal (and semi-formal) methods and software testing - now being a subject group of two BCS Special Interest Groups: Formal Aspects of Computing Science (BCS FACS) and Special Interest Group in Software Testing (BCS SIGIST).

Each of the 12 chapters in this book describes a way in which the study of formal methods and software testing can be combined in a manner that brings the benefits of formal methods (e.g., precision, clarity, provability) with the advantages of testing (e.g., scalability, generality, applicability).

The refereed proceedings of the Third International Conference of Z and B Users, ZB 2003, held in Turku, Finland in June 2003. The 28 revised full papers presented together with 3 invited papers were carefully reviewed and selected for inclusion in the book. The book documents the recent advances for the Z formal specification notation and for the B method, spanning the full scope from foundational, theoretical, and methodological issues to advanced applications, tools, and case studies.

This book constitutes the refereed proceedings of the Second International Conference of B and Z Users, ZB 2002, held in Grenoble, France in January 2002. The 24 papers presented together with three invited contributions were carefully reviewed and selected for inclusion in the book. The book documents the recent advances for the Z formal specification notion and for the B method; the full scope is covered, ranging from foundational and theoretical issues to advanced applications, tools, and case studies.

This book constitutes the refereed proceedings of the First International Conference of B and Z Users, ZB 2000, held in York, UK in August/September 2000.
The 25 revised full papers presented together with four invited contributions were carefully reviewed and selected for inclusion in the book. The book documents the recent advances for the Z formal specification notion and for the B method; the full scope, ranging from foundational and theoretical issues to advanced applications, tools, and case studies, is covered.

Industrial Strength Formal Methods in Practice provides hands-on experience and guidance for anyone who needs to apply formal methods successfully in an industrial context. Each chapter is written by an expert in software engineering or formal methods, and contains background information, introductions to the techniques being used, actual fragments of formalised components, details of results and an analysis of the overall approach. It provides specific details on how to produce high-quality software that comes in on-time and within budget. Aimed mainly at practitioners in software engineering and formal methods, this book will also be of interest to the following groups; academic researchers working in formal methods who are interested in evidence of their success and in how they can be applied on an industrial scale, and students on advanced software engineering courses who need real-life specifications and examples on which to base their work.

This volume provides the reader with a comprehensive introduction to system specification and design methods, with particular emphasis on structured and formal methods, method integration, concurrency and safety-critical systems. It contains both new material by Michael Hinchey and Jonathan Bowen, along with reprints of classic articles on high-integrity systems which have never before appeared together in a single volume. Among these classic articles are contributions from such leading names as Leslie Lamport, Nancy Leveson, and C.A.R. Hoare. Also included is a Foreword by David Lorge Parnas. High-Integrity System Specification and Design will provide practitioners and researchers convenient access to a range of essential essays - both classic and state-of-the-art - in a single volume. It provides them with details of specification and design approaches for this type of system, an overview of the development process, and evidence of how various classes of high- integrity systems may be approached and developed successfully.

1 In a number of recent presentations - most notably at FME'96 -oneofthe foremost scientists in the ?eld of formal methods, C.A.R. Hoare, has highlighted the fact that formal methods are not the only technique for producing reliable software. This seems to have caused some controversy, not least amongst formal methods practitioners. How can one of the founding fathers of formal methods seemingly denounce the ?eld of research after over a quarter of a century of support? This is a question that has been posed recently by some formal methods skeptics. However, Prof. Hoare has not abandoned formal methods. He is reiterating, 2 albeitmoreradically, his1987view thatmorethanonetoolandnotationwillbe requiredinthepractical, industrialdevelopmentoflarge-scalecomplexcomputer systems; and not all of these tools and notations will be, or even need be, formal in nature. Formalmethods arenotasolution, butratheroneofaselectionoftechniques that have proven to be useful in the development of reliable complex systems, and to result in hardware and software systems that can be produced on-time and within a budget, while satisfying the stated requirements. After almostthree decades, the time has come to view formalmethods in the context of overall industrial-scale system development, and their relationship to othertechniquesandmethods.Weshouldnolongerconsidertheissueofwhether we are "pro-formal" or "anti-formal," but rather the degree of formality (if any) that we need to support in system development. This is a goal of ZUM'98, the 11th International Conference of Z Users, held for the ?rst time within continental Europe in the city of Berlin, Germany.

This book constitutes the refereed proceedings of the 10th International Conference of Z Users, ZUM'97, held in Reading, UK, in April 1997.
The volume presents 18 revised full papers together with three invited presentations by internationally leading experts. The papers are organized into topical sections on real-time systems, tools, logic, system development, reactive systems, refinement, and applications. Also a select Z bibliography by Jonathan Bowen is added. All in all, the book competently reports the state-of-the-art in research and advanced applications of the Z notation.

This book presents the proceedings of the 9th International Conference of Z Users, ZUM '95, held in Limerick, Ireland in September 1995.
The book contains 34 carefully selected papers on Z, using Z, applications of Z, proof, testing, industrial usage, object orientation, animation of specification, method integration, and teaching formal methods. Of particular interest is the inclusion of an annotated Z bibliography listing 544 entries. While focussing on Z, by far the most commonly used "formal method" both in industry and application, the volume is of high relevance for the whole formal methods community.

This book constitutes the refereed proceedings of the 5th International School on Engineering Trustworthy Software Systems, SETSS 2019, held in Chongqing, China, in April 2019. The five chapters in this volume provide lectures on leading-edge research in methods and tools for use in computer system engineering. The topics covered in these chapter include Seamless Model-based System Development: Foundations; From Bounded Reachability Analysis of Linear Hybrid Automata to Verification of Industrial CPS and IoT; Weakest Preexpectation Semantics for Bayesian Inference: Conditioning, Continuous Distributions and Divergence; K - A Semantic Framework for Programming Languages and Formal Analysis Tools; and Software Abstractions and Human-Cyber-Physical Systems Architecture Modelling.

This volume contains a record of some of the lectures and seminars delivered at the Second International School on Engineering Trustworthy Software Systems (SETSS 2016), held in March/April 2016 at Southwest University in Chongqing, China. The six contributions included in this volume provide an overview of leading-edge research in methods and tools for use in computer system engineering. They have been distilled from six courses and two seminars on topics such as: modelling and verification in event-B; parallel programming today; runtime verification; Java in the safety-critical domain; semantics of reactive systems; parameterized unit testing; formal reasoning about infinite data values; and Alan Turing and his remarkable achievements. The material is useful for postgraduate students, researchers, academics, and industrial engineers, who are interested in the theory and practice of methods and tools for the design and programming of trustworthy software systems.

This book constitutes the refereed proceedings of the 6th International Symposium on Unifying Theories of Programming, UTP 2016, held in Reykjavik, Iceland, in June 2016, in conjunction with the 12th International Conference on Integrated Formal Methods, iFM 2016. The 8 revised full papers presented were carefully reviewed and selected from 10 submissions. They deal with the fundamental problem of combination of formal notations and theories of programming that define in various different ways many common notions, such as abstraction refinement, choice, termination, feasibility, locality, concurrency, and communication. They also show that despite many differences, such theories may be unified in a way that greatly facilitates their study and comparison.

This volume contains lectures on leading-edge research in methods and tools for use in computer system engineering; at the 4th International School on Engineering Trustworthy Software Systems, SETSS 2018, held in April 2018 at Southwest University in Chongqing, China. The five chapters in this volume provide an overview of research in the frontier of theories, methods, and tools for software modelling, design, and verification. The topics covered in these chapter include Software Verification with Whiley, Learning Buchi Automata and Its Applications, Security in IoT Applications, Programming in Z3, and The Impact of Alan Turing: Formal Methods and Beyond. The volume provides a useful resource for postgraduate students, researchers, academics, and engineers in industry, who are interested in theory, methods, and tools for the development of trustworthy software.