PPT-Undecidable Languages

Chapter 42 H éctor MuñozAvila Undecidable Languages We are going to make 2 proofs An existence proof We show that a language L must exist that cannot be decidedrecognized with . Class 18: . Proving Undecidability. Spring 2010. University of Virginia. David Evans. Menu. Revisiting the Halting Problem . Proof by Paradox. Universal Programming Languages. Reduction Proofs. Barbara . Theory of Computation. Alexander . Tsiatas. Spring 2012. Theory of Computation Lecture Slides by Alexander . Tsiatas. is licensed under a Creative Commons Attribution-. NonCommercial. -. ShareAlike. Unit 9: . Undecidability. [Slides . adapted from . Amos Israeli’s]. Limits to computation. There are problems for which there cannot be an algorithm, provably.. Undecidable problems. There are problems for which polynomial-time algorithms are unlikely to exist. Homework. HW8 due Tues 5/29 11am. HW5 grades are out. Monday is Memorial Day; no office hours, etc.. Go see a parade, or some fireworks, or something. TA Evaluations at the end of class. !. There’s a lot of stuff in today’s lecture. Lecture14: Recap. Prof. Amos Israeli. Regular languages – Finite automata.. Context free languages – Stack automata.. Decidable languages – Turing machines.. Undecidability.. Reductions.. Subjects. “Language Death” by David Crystal. Chapter 1: What is language death?. Chapter 5: What can be done?. Language Death . Number of languages. How to count. Names of Languages. Own name, others names. 26 September. Think. Discuss. Write. History & Aims of EDL. Since 2001, when the European Year of Languages was launched by the Council of Europe and the European Union, EDL has been celebrated around the world each year on the 26. JUSTUS C ROUX. IMS STUTTGART. 13.07.2015. OUTLINE. Concept Resource scarce languages. Overview of the language situation in South Africa. Lack of language resources and high level support for development of resources. SS6G11 The student will describe the cultural characteristics of Europe. a. Explain the diversity of European languages as seen in a comparison of German, English, Russian, French, and Italian. Guten. Jakelin. Troy. Director of Research, Indigenous Social and Cultural Wellbeing, AIATSIS. Doug Marmion . Research Fellow, AIATSIS Centre for Australian Languages. Michael Walsh. Senior Research . Fellow, AIATSIS Centre for Australian Languages. Victorian Curriculum F–10. Released in September 2015 as a central component of the Education State. Provides a stable foundation for the development and implementation of whole-school teaching and learning programs. AKPAN, . OKOKON . UDO & OKON, EMMANUEL AKANINYENE. DEPARTMENT OF LINGUISTICS & NIGERIAN LANGUAGES. UNIVERSITY OF UYO, AKWA IBOM STATE, NIGERIA. okokonakpan@uniuyo.edu.ng. . & . akanokon.eo@gmail.com. CS 170b. Benjamin Gaska, much help from William Mitchell. What is a programming language. A simple definition:. A system for describing computation.. It is generally agreed that in order for a language to be . A mother language is spoken by groups of people who become separated by time and distance. Those groups then form new languages based on a common origin.. LANGUAGE FAMILY. : a collection of languages related through a common ancestral language that existed before recorded history. (Indo-European is the world’s most extensive language family.).