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Computational lambda calculus: A combination of functional and
Computational lambda calculus: A combination of functional and

... calculus we can express it as a lambda abstraction AF. AH. ) which is LMNNO = A. AF. F which is a function of one argument that, when applied, returns as an output another function that accepts a second argument and then calculates a result in the same way as . This technique was invented by Mo ...
Functional Programming in CLEAN
Functional Programming in CLEAN

... descriptions of the way a result can be computed, given some arguments. A natural way to write a computer program is therefore to define some functions and applying them to concrete values. We need not to constrain ourselves to numeric functions. Functions can also be defined that have, e.g., sequen ...
Scala - Dave Reed
Scala - Dave Reed

... ● Even numbers and functions are objects o Since numbers are objects they have methods ...
Termination of Higher-order Rewrite Systems
Termination of Higher-order Rewrite Systems

... computation are syntactic expressions in some formal language. A rewrite system consists of a collection of rules (the program). A computation step is performed by replacing a part of an expression by another expression, according to the rules. The resulting expression may be rewritten again and aga ...
Types and Programming Languages
Types and Programming Languages

... x : U  x: U x : U  x : U T  App x : U  xx : T We can see that U must be of the form U  T but this is not possible (unless we have recursive types, which are coming later). ...
Introduction to Computational Logic
Introduction to Computational Logic

Declarative Programming in Escher
Declarative Programming in Escher

... program, that is, each axiom in the theory be true in the intended interpretation. This is because an implementation must guarantee that computed answers be correct in all models of the logic component of the program and hence be correct in the intended interpretation. Ultimately, the programmer is ...
Calculating Functional Programs - Research School of Computer
Calculating Functional Programs - Research School of Computer

proof terms for classical derivations
proof terms for classical derivations

... result (in that order) and disharged them in turn (also in that order). Seeing this, you may realise that there are two other proofs of the same formula. One where the conjuncts are formed in the other order (with term λyλxxy, xy) and the other, where the first discharged assumption of p is vacuous, ...
Programming with Miranda
Programming with Miranda

... storage locations, but instead has the ability to give names to the values of expressions; these names may then be used in other expressions or passed as parameters to functions. 2. The fact that in a functional language a name or an expression has a unique value that will never change is known as r ...
Introducing Haskell COS 441 Slides 3  Slide content credits:
Introducing Haskell COS 441 Slides 3 Slide content credits:

A Logical Foundation for Session
A Logical Foundation for Session

Higher Order Logic - Theory and Logic Group
Higher Order Logic - Theory and Logic Group

... Higher order logics, long considered by many to be an esoteric subject, are increasingly recognized for their foundational importance and practical usefulness, notably in Theoretical Computer Science. In this chapter we try to present a survey of some issues and results, without any pretense of comp ...
Higher Order Logic - Indiana University
Higher Order Logic - Indiana University

... Higher order logics, long considered by many to be an esoteric subject, are increasingly recognized for their foundational importance and practical usefulness, notably in Theoretical Computer Science. In this chapter we try to present a survey of some issues and results, without any pretense of comp ...
Interpreters for two simple languages – including exercises
Interpreters for two simple languages – including exercises

CS 403 - Programming Languages
CS 403 - Programming Languages

Abella: A System for Reasoning about Relational Specifications
Abella: A System for Reasoning about Relational Specifications

Functional Programming and Compiler Design
Functional Programming and Compiler Design

... Functions and other values begin with small letters … … types begin with capital letters. ...
A Representation Theorem for Second-Order Functionals
A Representation Theorem for Second-Order Functionals

Coding a Lisp Interpreter in Shen: a Case Study
Coding a Lisp Interpreter in Shen: a Case Study

ppt - CS603
ppt - CS603

C# is a functional programming language
C# is a functional programming language

... Demo: strongly-typed printf ...
Probabilistic Modelling, Inference and Learning using Logical
Probabilistic Modelling, Inference and Learning using Logical

... Example 3 The term (#Int 2 (#Int 3 []Int )) represents a list with the numbers 2 and 3 in it, obtained via a series of applications from the constants #Int , []Int , 2, and 3, each of which is a term. For convenience, we sometimes write [2, 3] to represent the same list. Example 4 Sets are identifie ...
minimum models: reasoning and automation
minimum models: reasoning and automation

Proofs in theories
Proofs in theories

1 2 3 4 5 ... 10 >

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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