Domains and Lambda-Calculi

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Cambridge University Press, 2 Jul 1998 - Computers - 484 pages
This book describes the mathematical aspects of the semantics of programming languages. The main goals are to provide formal tools to assess the meaning of programming constructs in both a language-independent and a machine-independent way and to prove properties about programs, such as whether they terminate, or whether their result is a solution of the problem they are supposed to solve. In order to achieve this the authors first present, in an elementary and unified way, the theory of certain topological spaces that have proved of use in the modeling of various families of typed lambda calculi considered as core programming languages and as meta-languages for denotational semantics. This theory is now known as Domain Theory, and was founded as a subject by Scott and Plotkin. One of the main concerns is to establish links between mathematical structures and more syntactic approaches to semantics, often referred to as operational semantics, which is also described. This dual approach has the double advantage of motivating computer scientists to do some mathematics and of interesting mathematicians in unfamiliar application areas from computer science.
 

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Contents

Syntactic theory of the Acalculus
22
Doo models and intersection types
43
Interpretation of Acalculi in CCCs
71
The Language PCF
124
Domain equations
144
Values and computations
168
Powerdomains
200
Stone duality
215
Stability
270
Towards linear logic
301
Sequentiality
341
Domains and realizability
388
Functions and processes
421
Summary of recursion theory
449
References and bibliography
469
Index
480

Dependent and second order types
240

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Page 215 - L6 . x A (y V z) = (x A y) V (x A z) L6".
Page 471 - Blass. A game semantics for linear logic. Annals of Pure and Applied Logic, 56:183-220, 1992.
Page ii - J.-J. Ch. Meyer &; W. van der Hoek Epistemic Logic for AI and Computer Science 42.
Page 8 - Hausdorff: if x ^ y, then there exist disjoint open sets U and V such that x £ U and y € V.
Page 161 - The proof of this theorem is an immediate consequence of the following lemmas.
Page 43 - — »" is contravariant in its first argument and covariant in its second argument.
Page 417 - ... restructured and new functionalities are added. Such theories support an incremental design of software systems and establish under which conditions the programmer is allowed to reuse previously created modules. Such reuse may require the introduction of explicit or implicit coercions whose effect on the semantics of the program has to be clearly understood by the programmer. A formalization of this concept in the context of typed languages can be given in two steps...
Page 348 - The following example shows that this is not true in general. Let X...
Page 376 - natural' algorithm that computes the semantic function IJ (cf. exercise 14.3.53) and denoting likewise by BT the minimum algorithm computing BT, does the equality (of algorithms) [_] = [_J o BT hold? In other words, does the semantic evaluation respect the indications of sequentiality provided by the syntax itself? (2) If a and a' are two definable algorithms such that a < a', can we find N and N' such that N < N' (in the sense of definition 2.3.1), a = [JV], and a
Page 350 - We first remark that the last assertion of (1) follows from the others, since if x ^ z, then the existence of a chain between x and y as described in the statement entails that u or w is of type 'valof '. Let s and t be two proofs of xc1 and zc1 in a, respectively; here is the detail of s until the first enabling of type 'output...

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