Download e-book for kindle: Beauty Is Our Business: A Birthday Salute to Edsger W. by W.H.J. Feijen, A.J.M. van Gasteren, David Gries, J. Misra

By W.H.J. Feijen, A.J.M. van Gasteren, David Gries, J. Misra

ISBN-10: 1461244765

ISBN-13: 9781461244769

ISBN-10: 1461287928

ISBN-13: 9781461287926

More than anything, this booklet is a tribute to Edsger W. Dijkstra, at the party of his 60th birthday, by means of quite a few of these lucky sufficient to be prompted by means of him and his paintings and to be known as his buddy or relation, his grasp, colleague, or student. This booklet includes fifty-four technical contributions in numerous components of activity, even supposing lots of them care for a space of specific main issue to Dijkstra: programming. every one contribution is comparatively brief and will be digested in a single sitting. jointly, they shape a pleasant go portion of the self-discipline of programming in the beginning of the nineties. whereas many recognize of Dijkstra's technical contributions, they might not pay attention to his final objective, the mastery of complexity in arithmetic and computing technological know-how. He has forcefully argued that attractiveness and style are necessary to this mastery. The name of this publication, selected to mirror his final objective, comes from a sentence in a piece of writing of his on a few attractive arguments utilizing mathematical induction: "... once we recognize the conflict opposed to chaos, mess, and unmastered complexity as one in every of computing sci- ence's significant callings, we needs to admit that 'Beauty Is Our Business'."

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Additional info for Beauty Is Our Business: A Birthday Salute to Edsger W. Dijkstra

Example text

Then n#/ . allp

To define remdup we can use the specification given above. Alternatively, since duplicate elements always occur together in our problem, we can define a modified version head*· n#/ . remdup' = dup x = all (head x =) x all dup« . parts , where This reads : take the first elements of members of the shortest partition in which all components are sequences of the same element. Thus remdup' removes adjacent duplicates only. We give this fourth specification mainly to demonstrate that a surprising number of problems about sequences can be formulated in terms of partitions .

Other research has recently taken similar dire ctions, although details are quit e different from the approach taken here [6,9,11]. The benefits of t his approach are many: • a module designer no longer needs knowledge about other modul es; only t he commonl y used data must be known . Thi s clearl y is very desirable for separate development of large systems, where design teams ar e often geogra phically dispersed; • great improvements are expected in t he ar ea of correctness demonst ration; 5.

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Beauty Is Our Business: A Birthday Salute to Edsger W. Dijkstra by W.H.J. Feijen, A.J.M. van Gasteren, David Gries, J. Misra


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