On the Existence of Open and Bi-continuing Codes
نویسنده
چکیده
Given an irreducible sofic shift X, we show that an irreducible shift of finite type Y of lower entropy is a factor of X if and only if it is a factor of X by an open bi-continuing code. If these equivalent conditions hold and Y is mixing, then any code from a proper subshift of X to Y can be extended to an open bi-continuing code on X. These results are still valid when X is assumed to be only an almost specified shift, i.e., a subshift satisfying an irreducible version of the specification property.
منابع مشابه
A Tabu Search Method for a New Bi-Objective Open Shop Scheduling Problem by a Fuzzy Multi-Objective Decision Making Approach (RESEARCH NOTE)
This paper proposes a novel, bi-objective mixed-integer mathematical programming for an open shop scheduling problem (OSSP) that minimizes the mean tardiness and the mean completion time. To obtain the efficient (Pareto-optimal) solutions, a fuzzy multi-objective decision making (fuzzy MODM) approach is applied. By the use of this approach, the related auxiliary single objective formulation can...
متن کاملInformation literacy in public libraries from the perspective of public libraries’ policymakers; an exploratory study
Purpose: The present paper aims to conduct an exploratory study on the status of information literacy in upstream documents and curriculums of Iran public libraries institutions for public libraries. Methodology: This is a developmental exploratory-qualitative study in terms of purpose. Research data were collected using in-depth, semi-structured interviews with policymakers and officials of p...
متن کاملTreatment of Open Tibial Fractures: Convert-ing or Continuing External Fixation?
Background: The treatment of open tibial fractures is still an orthopaedic challenge and full of complications. In many cases the use of external fixator that has been known as a non-union machine is obligatory with a high incidence of pin track infection and other complications. The aim of this study was to compare the use of external fixation as a definite method for treatment of open tibial ...
متن کاملReasons for Participation of Ophthalmologist in Continuing Medical Education
Purpose: Today, Continues Medical Education (CME) is considered as one of the methods to improve knowledge and clinical performance of physicians. In this regard, all physicians will become familiar with new and more effective therapies and are encouraged to follow them. The present qualitative study aims at explaining the reasons for the participation of Iranian ophthalmologists in continuing ...
متن کاملThe Optimization of Open- Space Based on Social Theory in Iran
The usage of social theories in the human-built environment caused to enhance life quality. It may consist of human needs in residential areas. Sometimes, building codes can help to exist accepted life space, but the building codes do not have basic theory such as actual open space in residential plots. The study was an attempt to represent a new approach in urban land subdivision and the relat...
متن کامل