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Relative Completeness for Logics of Functional Programs
Relative Completeness for Logics of Functional Programs

... is not available in the language of T though primitive recursion is. But this is not a real restriction since all inhabited r.e. sets can be enumerated by a primitive recursive function. This fact will be used subsequently without further mention. As shown in Plotkin’s paper [21] every coherently co ...
PDF
PDF

... that are inherently vacuous by model but are not inherently vacuous by mutation. For example, consider the formula ϕ = p ∨ q. Every deterministic Kripke structure that satisfies ϕ has its (single) initial state labeled either by p or by q or by both, and thus it satisfies ϕ vacuously. On the other h ...
(λx. From x Functions to x Types) Higher-Order
(λx. From x Functions to x Types) Higher-Order

Completeness theorems and lambda
Completeness theorems and lambda

Forking in simple theories and CM-triviality Daniel Palacín Cruz
Forking in simple theories and CM-triviality Daniel Palacín Cruz

Standard ML: A Quick Tutorial
Standard ML: A Quick Tutorial

...  Since no identifier is given to bind to the value, the interactive system has chosen the identifier it and bound it to the result of 4+6  The semicolon (";") is a marker that indicates to the SML/NJ system that it should perform the interactive top-level loop Hossein Hojjat ...
Lambda Calculus
Lambda Calculus

...  Since no identifier is given to bind to the value, the interactive system has chosen the identifier it and bound it to the result of 4+6  The semicolon (";") is a marker that indicates to the SML/NJ system that it should perform the interactive top-level loop Hossein Hojjat ...
Curry-Howard Isomorphism - Department of information engineering
Curry-Howard Isomorphism - Department of information engineering

... systems of formal logic as encountered in proof theory and computational calculi as found in type theory. For instance, minimal propositional logic corresponds to simply typed λ-calculus, first-order logic corresponds to dependent types, second-order logic corresponds to polymorphic types, etc. The ...
Lecture Notes on the Lambda Calculus
Lecture Notes on the Lambda Calculus

... exists exactly one y ∈ Y such that (x, y) ∈ f . Two functions f, g : X → Y are considered equal if they yield the same output on each input, i.e., f (x) = g(x) for all x ∈ X. This is called the extensional view of functions, because it specifies that the only thing observable about a function is how ...
INTEGRATION OF FUNCTIONAL PROGRAMMING AND
INTEGRATION OF FUNCTIONAL PROGRAMMING AND

... Functional programming is so called because a program consists entirely of functions (Hughes, 1989). The main program itself is written as a function which receives the program’s input as its argument and delivers the program’s output as its result. Features of modern functional languages also inclu ...
Higher-order Logic: Foundations
Higher-order Logic: Foundations

... • Higher-order logic (HOL) is an expressive foundation for mathematics: analysis, algebra, . . . ...
M-rank and meager groups
M-rank and meager groups

Beginning with the Haskell Programming Language About the Tutorial
Beginning with the Haskell Programming Language About the Tutorial

... There are (optionally) two parts to a function definition. The first part (conceptually, not necessarily within a listing) is the type signature of a function. In a function, the type signature defines all the types of the input, and the type of the output. Some analogous C definitions are given in ...
Intuitionistic completeness part I
Intuitionistic completeness part I

... not constructively valid. We take a very different approach, effectively converting uniform evidence for validity into a proof. We do this by building objects called evidence structures that reveal the evidence term layer by layer. For instance, when we see evidence of the form λ(x.b(x)) for a formu ...
Notions of Computability at Higher Type
Notions of Computability at Higher Type

of Folding Domain−Specific Languages: Deep and Shallow
of Folding Domain−Specific Languages: Deep and Shallow

... A shallow embedding supports only compositional interpretations, whereas a deep embedding provides full access to the AST and hence also non-compositional manipulations. Here, ‘compositionality’ of an interpretation means that the interpretation of a whole may be determined solely from the interpret ...
higher-order logic - University of Amsterdam
higher-order logic - University of Amsterdam

... etcetera, referring to specific finite quantities. What is lacking, however, is the general mathematical concept of finiteness. EXAMPLE. The notion ‘finiteness of the domain’ is not definable by means of any first-order sentence, or set of such sentences. It will be recalled that the relevant refuta ...
View raw file - aaa
View raw file - aaa

...  We say (ω ω) doesn’t have a normal form.  To solve this problem, we introduce types. ...
A taste of Haskell
A taste of Haskell

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... 1. Type Theory vs. Set Theory 2. Overview of the Nuprl System 3. Proofs of the Integer Square Root Problem ...
TR-14-06 - Ynot - Harvard University
TR-14-06 - Ynot - Harvard University

... the types of memory locations are invariant. This restriction makes it difficult to model stateful protocols as in the Vault programming language [8], or low-level languages such as TAL [29] and Cyclone [16] where memory management is intended to be coded within the language. The second advantage is ...
programming in haskell
programming in haskell

...  The arrow  associates to the right. Int  Int  Int  Int ...
CA320 - Computability & Complexity
CA320 - Computability & Complexity

The Continuity of Monadic Stream Functions
The Continuity of Monadic Stream Functions

Unit 11 — Functional Programming with Haskell
Unit 11 — Functional Programming with Haskell

... Lists/1 Haskell also supports lists with the standard square bracket notation ...
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Intuitionistic type theory

Intuitionistic type theory (also known as constructive type theory, or Martin-Löf type theory) is a type theory and an alternative foundation of mathematics based on the principles of mathematical constructivism. Intuitionistic type theory was introduced by Per Martin-Löf, a Swedish mathematician and philosopher, in 1972. Martin-Löf has modified his proposal a few times; his 1971 impredicative formulation was inconsistent as demonstrated by Girard's paradox. Later formulations were predicative. He proposed both intensional and extensional variants of the theory. For more detail see the section on Martin-Löf type theories below.Intuitionistic type theory is based on a certain analogy or isomorphism between propositions and types: a proposition is identified with the type of its proofs. This identification is usually called the Curry–Howard isomorphism, which was originally formulated for intuitionistic logic and simply typed lambda calculus. Type theory extends this identification to predicate logic by introducing dependent types, that is types which contain values.Type theory internalizes the interpretation of intuitionistic logic proposed by Brouwer, Heyting and Kolmogorov, the so-called BHK interpretation. The types in type theory play a similar role to sets in set theory but functions definable in type theory are always computable.
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