'Grammars' presentation slideshows

Chapter 3

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Reverse of a Regular Language

Reverse of a Regular Language. Proof idea:. Construct NFA that accepts :. invert the transitions of the NFA that accepts. Theorem:. The reverse of a regular language is a regular language. Proof. Since is regular, there is NFA that accepts. Example:.

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Context-Free Languages

Context-Free Languages. Regular Languages. Context-Free Languages. Regular Languages. Context-Free Languages. Context-Free Grammars. Pushdown Automata. stack. automaton. Context-Free Grammars. Grammars. Grammars express languages Example: the English language.

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Chapter 3 Describing Syntax and Semantics

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Chapter 5 Context-Free Grammars

Chapter 5 Context-Free Grammars. Grammar (Review). A grammar is a 4-tuple G = ( NT , T , P , S ), where NT : a finite set of non-terminal symbols T : a finite set of terminal (alphabet) symbols S : is the starting symbol S ? NT P : a finite set of production rules: x ? y

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C O N T E X T - F R E E LANGUAGES ( use a grammar to describe a language)

C O N T E X T - F R E E LANGUAGES ( use a grammar to describe a language). Context-free grammars. Ch.1 introduced two different, though equivalent, methods of describing languages: finite automata and regular expressions .

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2.3 Properties of Context-free Languages

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Introduction to Syntax

Introduction to Syntax. Owen Rambow rambow@cs.columbia.edu September 30. What is Syntax?. Study of structure of language Specifically, goal is to relate surface form (e.g., interface to phonological component) to semantics (e.g., interface to semantic component)

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Normal forms for Context-Free Grammars

Normal forms for Context-Free Grammars. Context-Free Grammar. In linguistics and computer science, a context-free grammar (CFG) is a formal grammar in which every production rule is of the form V ? w

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Normal forms for Context-Free Grammars

Normal forms for Context-Free Grammars. Context-Free Grammar. In linguistics and computer science, a context-free grammar (CFG) is a formal grammar in which every production rule is of the form V ? w

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Language Modeling

Language Modeling. Julia Hirschberg CS 4706. Approaches to Language Modeling. Context-Free Grammars Use in HTK Ngram Models. Context-Free Grammars. Defined in formal language theory Terminals: e.g. cat Non-terminal symbols: e.g. NP, VP Start symbol: e.g. S

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Context-free Languages

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Outline

Outline. Nucleic Acids Basics The Problem of Predicting Nucleic Acid Structure Thermodynamics and Phylogeny Comparison A commonly used program for predicting RNA secondary structure---mFOLD Predicting RNA Tertiary Structures by Mc-Sym. Biological Functions of Nucleic Acids.

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Motion Grammars for Character Animation Kyunglyul Hyun, Kyungho Lee, and Jehee Lee

Motion Grammars for Character Animation Kyunglyul Hyun, Kyungho Lee, and Jehee Lee. Niels Mulder & Floris de Vries. Overview. Goal: Creating a (context-free) grammar to describe and animate basketball. Motion grammar Multi-Level Markov Chain Monte Carlo Tactic board. Related work.

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Lesson 2

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How Language Structures Concepts

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Discrete Structure

Discrete Structure. Li Tak Sing( 李德成 ). From grammar to inductive definition. Consider the following grammar: S |aB B b|bB Basis: , abL(G) Induction: if ay  L(G), then aby  L(G). Constructing grammars. {a n |n N} S|aS {a n b n |n N} S |aSb {(ab) n |nN} S |abS.

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Teme deschise SINTAX ?

Teme deschise SINTAX ?. Principale direc?ii - 1. 1955-1964 Transformational Grammars K . Johnson (2004). Introduction to Transformational Grammar . University of Massachusetts at Amherst .

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Compiler Summary

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