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Z User Workshop York 1991
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Author : J. E. Nicholls
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Z User Workshop York 1991 written by J. E. Nicholls and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Computers categories.
In ordinary mathematics, an equation can be written down which is syntactically correct, but for which no solution exists. For example, consider the equation x = x + 1 defined over the real numbers; there is no value of x which satisfies it. Similarly it is possible to specify objects using the formal specification language Z [3,4], which can not possibly exist. Such specifications are called inconsistent and can arise in a number of ways. Example 1 The following Z specification of a functionf, from integers to integers "f x : ~ 1 x ~ O· fx = x + 1 (i) "f x : ~ 1 x ~ O· fx = x + 2 (ii) is inconsistent, because axiom (i) gives f 0 = 1, while axiom (ii) gives f 0 = 2. This contradicts the fact that f was declared as a function, that is, f must have a unique result when applied to an argument. Hence no suchfexists. Furthermore, iff 0 = 1 andfO = 2 then 1 = 2 can be deduced! From 1 = 2 anything can be deduced, thus showing the danger of an inconsistent specification. Note that all examples and proofs start with the word Example or Proof and end with the symbol.1.
Z User Workshop Oxford 1990
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Author : J.E. Nicholls
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-11
Z User Workshop Oxford 1990 written by J.E. Nicholls and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Computers categories.
Z User Workshop London 1992
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Author : J.P. Bowen
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09
Z User Workshop London 1992 written by J.P. Bowen and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Computers categories.
The Z notation has been developed at the Programming Research Group at the Oxford University Computing Laboratory and elsewhere for over a decade. It is now used by industry as part of the software (and hardware) development process in both Europe and the USA. It is currently undergoing BSI standardisation in the UK, and has been proposed for ISO standardisation internationally. In recent years researchers have begun to focus increasingly on the development of techniques and tools to encourage the wider application of Z and other formal methods and notations. This volume contains papers from the Seventh Annual Z User Meeting, held in London in December 1992. In contrast to previous years the meeting concentrated specifically on industrial applications of Z, and a high proportion of the participants came from an industrial background. The theme is well represented by the four invited papers. Three of these discuss ways in which formal methods are being introduced, and the fourth presents an international survey of industrial applications. It also provides a reminder of the improvements which are needed to make these methods an accepted part of software development. In addition the volume contains several submitted papers on the industrial use of Z, two of which discuss the key area of safety-critical applications. There are also a number of papers related to the recently-completed ZIP project. The papers cover all the main areas of the project including methods, tools, and the development of a Z Standard, the first publicly-available version of which was made available at the meeting. Finally the volume contains a select Z bibliography, and section on how to access information on Z through comp.specification.z, the international, computer-based USENET newsgroup. Z User Workshop, London 1992 provides an important overview of current research into industrial applications of Z, and will provide invaluable reading for researchers, postgraduate students and also potential industrial users of Z.
Z User Workshop Cambridge 1994
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Author : J.P. Bowen
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Z User Workshop Cambridge 1994 written by J.P. Bowen and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Computers categories.
This volume contains papers from the Eighth Z User Meeting, to be held at the University of Cambridge from 29 - 30 June 1994. The papers cover a wide range of issues associated with Z and formal methods, with particular reference to practical application. These issues include education, standards, tool support, and interaction with other design paradigms such as consideration of real-time and object-oriented approaches to development. Among the actual topics covered are: the formal specification in Z of Defence Standard 00-56; formal specification of telephone features; specifying and interpreting class hierarchies in Z; and software quality assurance using the SAZ method. Z User Workshop, Cambridge 1994 provides an important overview of current research into industrial applications of Z, and will provide invaluable reading for researchers, postgraduate students and also potential industrial users of Z.
Z User Workshop York 1991
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Author : John E. Nicholls
language : en
Publisher: Springer Verlag
Release Date : 1992
Z User Workshop York 1991 written by John E. Nicholls and has been published by Springer Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Computers categories.
Z User Workshop
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Author :
language : en
Publisher:
Release Date : 1990
Z User Workshop written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Z (Computer program language) categories.
Z User Workshop London 1992
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Author : Jonathan Peter Bowen
language : en
Publisher: Springer
Release Date : 1993
Z User Workshop London 1992 written by Jonathan Peter Bowen and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Computers categories.
The Z notation has been developed at the Programming Research Group at the Oxford University Computing Laboratory and elsewhere for over a decade. It is now used by industry as part of the software (and hardware) development process in both Europe and the USA. It is currently undergoing BSI standardisation in the UK, and has been proposed for ISO standardisation internationally. In recent years researchers have begun to focus increasingly on the development of techniques and tools to encourage the wider application of Z and other formal methods and notations. This volume contains papers from the Seventh Annual Z User Meeting, held in London in December 1992. In contrast to previous years the meeting concentrated specifically on industrial applications of Z, and a high proportion of the participants came from an industrial background. The theme is well represented by the four invited papers. Three of these discuss ways in which formal methods are being introduced, and the fourth presents an international survey of industrial applications. It also provides a reminder of the improvements which are needed to make these methods an accepted part of software development. In addition the volume contains several submitted papers on the industrial use of Z, two of which discuss the key area of safety-critical applications. There are also a number of papers related to the recently-completed ZIP project. The papers cover all the main areas of the project including methods, tools, and the development of a Z Standard, the first publicly-available version of which was made available at the meeting. Finally the volume contains a select Z bibliography, and section on how to access information on Z through comp.specification.z, the international, computer-based USENET newsgroup. Z User Workshop, London 1992 provides an important overview of current research into industrial applications of Z, and will provide invaluable reading for researchers, postgraduate students and also potential industrial users of Z.
Z User Workshop
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Author :
language : en
Publisher:
Release Date : 1991
Z User Workshop written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Z (Computer program language) categories.
Z User Workshop
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Author : John E. Nicholls
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-14
Z User Workshop written by John E. Nicholls and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-14 with Computers categories.
The mathematical concepts and notational conventions we know of as Z were first proposed around 1981. Its origins were in line with the objectives of the PRG - to establish a mathematical basis for program ming concepts and to verify the work by case studies with industry. Hence among early Z users some were from academic circles, with interests in the mathematical basis of programming; others came from industry and were involved with pilot projects and case studies linked with the Programming Research Group. Four years ago we had the first Z User Meeting, a fairly modest affair with representatives more or less equally divided between academia and industry. At the first meeting there were, as in this meeting, a variety of technical papers, reports of work in progress and discussions. A number of people from industry came along, either because they had begun to use Z or were curious about the new direction. In the discussion sessions at the end of the meeting, there were calls from attendees for the establishment of a more stable base for the notation, including work on its documentation and standards. Many of these requests have now been satisfied and the notation is now being proposed for standards development.
Z User Workshop Oxford 1990
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Author : John E. Nicholls
language : en
Publisher: Springer Verlag
Release Date : 1991
Z User Workshop Oxford 1990 written by John E. Nicholls and has been published by Springer Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Computers categories.