3 edition of **The relationship between the structure and degrees of recursively enumerable sets** found in the catalog.

The relationship between the structure and degrees of recursively enumerable sets

David Paul Miller

- 247 Want to read
- 6 Currently reading

Published
**1981**
.

Written in

**Edition Notes**

Statement | by David Paul Miller. |

Classifications | |
---|---|

LC Classifications | Microfilm 82/421 (Q) |

The Physical Object | |

Format | Microform |

Pagination | iii, 149 leaves. |

Number of Pages | 149 |

ID Numbers | |

Open Library | OL3065845M |

LC Control Number | 82162804 |

Abstract. A set A of nonnegative integers is recursively enumerable (r.e.) if A can be computably listed. It is shown that there is a first-order property, Q(X), definable in E, the lattice of r.e. sets under inclusion, such that (i) if A is any r.e. set satisfying Q(A) then A is nonrecursive and Turing incomplete and (ii) there exists an r.e. set A satisfying Q(A). The Recursively Enumerable Degrees Richard A. Shore Department of Mathematics White Hall Cornell University Ithaca Ny USA September 9, 1. Introduction Decision problems were the motivating force in the search for a formal de nition of algorithm that constituted the beginnings of recursion (computability) theory.

For the Love of Physics - Walter Lewin - - Duration: Lectures by Walter Lewin. They will make you ♥ Physics. Recommended for you. Abstract. A set A of nonnegative integers is recursively enumerable (r.e.) if A can be computably listed. It is shown that there is a first-order property, Q(X), definable in E, the lattice of r.e. sets under inclusion, such that (i) if A is any r.e. set satisfying Q(A) then A is nonrecursive and Turing incomplete and (ii) there exists an r.e. set A satisfying Q(A).Cited by:

Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It only takes a minute to sign up. Example of a recursively enumerable set as a limit of recursive sets. Ask Question Asked 2 years, 11 months ago. In order to ensure that the limit of a sequence of. So the relationship between enumerable and countable is that if a set is enumerable it must be countable, but not vice versa. We say a set is countable when the cardinality of it is the same as the set of natural numbers, or in other words, we can assign a sequence number to each element in that set.

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"The book, written by one of the main researchers on the field, gives a complete account of the theory of r.e. degrees. The definitions, results and proofs are always clearly motivated and explained before the formal presentation; the proofs are described with remarkable clarity and conciseness/5(5).

Recursively Enumerable Sets and Degrees: A Study of Computable Functions and Computably Generated Sets | Robert I. Soare | download | B–OK. Download books for free. Find books. Recursively Enumerable Sets and Degrees: A Study of Computable Functions and Computably Generated Sets. "The book, written by one of the main researchers on the field, gives a complete account of the theory of r.e.

degrees.4/5(1). [Cp5] S. Cooper, An annotated bibliography for the structure of the degrees below 0' with special reference to that of the recursively enumerable degrees, Recursive Function Theory Newsletter 5 (), [Cp6] S.

Cooper, Minimal pairs and high recursively enumerable degrees, J. Symbolic Logic 39 (), Cited by: : Automorphisms of the Lattice of Recursively Enumerable Sets (Memoirs of the American Mathematical Society) (): Cholak, Peter: Books. A new reducibility between the recursive sets is defined, which is appropriate to be used in the study of the polynomial reducibility and the NP-problem.

Keywords Bounded recursively enumerable sets Author: Yuefei Sui. One important program in the study of the structure of F, the lattice of r.e. sets, is determining the relationship between the algebraic structure of a set and the degrees of the sets that share the same structure.

There has been a good deal of success in this program. For. RECURSIVELY ENUMERABLE SETS AND DEGREES The purpose of this paper is to give a survey of the main ideas and results on r.e. sets from Post's time up to the present state of the subject and latest research.

Sketches of proofs will be given to illustrate important methods, but technical details will be kept to a minimum. CLASSES OF RECURSIVELY ENUMERABLE SETS for generating 8a. (A simple formal proof of the recursive enumerability of 6A will follow Theorem 3.) Moreover, whether or not n is placed in 6a depends only on a property (inclusion) of the set enumerated by («, x) may produce its values.

A recursively enumerable language is a recursively enumerable subset of a formal language. The set of all provable sentences in an effectively presented axiomatic system is a recursively enumerable set.

Matiyasevich's theorem states that every recursively enumerable set is a Diophantine set (the converse is trivially true). The simple sets are recursively enumerable but not recursive. The creative sets are recursively enumerable but not recursive. A set A is verbose if F A 2 n \Gamma1 can be computed with n queries to A.

The range of possible query savings is limited by the following theorem: F A n cannot be computed with only blog nc queries to a set X unless A is recursive. In addition we produce the following: (1) a verbose. then will be an equivalence relation, whose individual classes are called -degrees (and recursively-enumerable -degrees if the class contains a recursively-enumerable set).Turing degrees are well known in the literature as degrees of undecidability (cf.

Degree of undecidability).The relation generates a partial order of all -degrees.A reducibility is weaker than if implies. As with the lattice of computable enumerable sets, it is natural to explore the relationship between this lattice and the Turing degrees.

We focus on an analog of maximality namely the notion of a. One important program in the study of the structure of W, the lattice of r.e. sets, is determining the relationship between the algebraic structure of a set and the degrees of the sets that share the same structure.

There has been a good deal of success in this program. For. In these lectures we survey some of the most important results and the fundamental methods concerning degrees of recursively enumerable (r.

e.) sets. We begin §1 with Post's simple sets and a recent elegant generalization of the recursion by: 1. Abstract: A set A of nonnegative integers is recursively enumerable (r.e.) if A can be computably listed. It is shown that there is a first order property, Q(X), definable in E, the lattice of r.e.

sets under inclusion, such that: (1) if A is any r.e. set satisfying Q(A) then A is nonrecursive and Turing incomplete; and (2) there exists an r.e. set A satisfying Q(A). Central concerns of the book are related theories of recursively enumerable sets, of degree of un-solvability and turing degrees in particular.

A second group of topics has to do with. Question 2 Explanation: A) Always True (Recursively enumerable - Recursive) is Recursively enumerable B) Not always true L1 - L3 = L1 intersection (Complement L3) L1 is recursive, L3 is recursively enumerable but not recursive Recursively enumerable languages are.

We say that an r.e. degree (T or W) has the anti-helping proper:y if it has a non-recursive, r.e., strita predecessor such that the higher degree is R. Ladner, L.P. Sasw j Weak truth table degrees of r.e. ;ets not below the least upper bound of this predecessor and any otter r.e. degree unless it is already below this other by: One current leading open question is: is the ordering of the d-r.e.

degrees isomorphic to the ordering of the degrees of sets which are differences of differences of r.e. sets. The book Recursively enumerable sets and degrees by R.I. Soare (Springer-Verlag, ) is an excellent introduction to the subject, which takes the reader from the basic.

The set of "recursive languages" or "recursive sets" are sets where you can write a program that tells you whether the given input is in the set or not. All recursive languages are also recursively enumerable because you can just enumerate every string, and then output it if it's in your set.

A set A of nonnegative integers is recursively enumerable (r.e.) if A can be computably listed. It is shown that there is a first-order property, Q(X), definable in E, the lattice of r.e. sets under inclusion, such that (i) if A is any r.e. set satisfying Q(A) then A is nonrecursive and Turing incomplete and (ii) there exists an r.e.

set A satisfying Q(A). This resolves a long open question Cited by: theory has been to determine a characterization of the algebraic structure of D and its most important substructure, R, the upper semi-lattice of the recursively enumerable (r.e.) degrees.

Since the r.e. sets are those that are effectively countable and hence occupy a central role in natural decision problems, it .