PPT-Grammars, Derivations

Author : sherrill-nordquist | Published Date : 2020-01-26

Grammars Derivations and Parsing Sample Grammar Simple arithmetic expressions E Basis Rules A Variable is an E An Integer is an E Inductive Rules If E 1 and E 2

Presentation Embed Code

Download Presentation

Download Presentation The PPT/PDF document "Grammars, Derivations" is the property of its rightful owner. Permission is granted to download and print the materials on this website for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.

Grammars, Derivations: Transcript

Grammars Derivations and Parsing Sample Grammar Simple arithmetic expressions E Basis Rules A Variable is an E An Integer is an E Inductive Rules If E 1 and E 2 are Es so is E 1 E 2 . 1 Leftmost/rightmost derivationsAmbiguous grammars 1. Consider the following grammar:. S . -> ( L . ) | a. L -> L , . S | S. Is this grammar ambiguous ?. Is this grammar LL(1) ?. Compute . the First and Follow sets for the new grammar.. Construct . Ehsan. . Khoddammohammadi. Recent Advances in Parsing Technology. WS 2012/13. Saarland University. 1. Outline. Definition and motivation behind . u. nsupervised . g. rammar learning. Non-parametric Bayesian statistics. Context-Free . Grammars. Ambiguity . CMSC 330. 2. Review. Why should we study CFGs?. What are the four parts of a CFG?. How do we tell if a string is accepted by a CFG?. What. ’. s a parse tree?. CMSC 330. Julia Hirschberg. CS 4705. Slides with contributions from Owen Rambow, Kathy McKeown, Dan Jurafsky and James Martin. Today. Context Free Grammars. Sentence types and constituents. Recursion and context-freeness. The Chomsky hierarchy of grammars . Context-free grammars describe languages that regular grammars can’t . Unrestricted. Context-sensitive. Context-free. Regular. Slide after Durbin, . et al. ., 1998. A . shorted version from. :. Anastasia . Berdnikova. &. Denis . Miretskiy. ‘Colourless green ideas sleep furiously’.. Chomsky constructed finite formal machines – ‘. grammars. ’.. ‘Does the language contain this sentence?’ (intractable) . Higher Level Physics Derivations Page 1 Leaving Cert Physics: Derivations 1. To Derive: v = u + at Derivation: Acceleration = Rate of Change in Velocity ݈݁݁ݎ ݐ&# Ravichandhran. . Madhavan. , . EPFL. Joint work with. Mikael . Mayër. , EPFL. Sumit. . Gulwani. , MSR. Viktor . Kuncak. , EPFL. Overview. u. nit -> . pkg. ? . i. mp* type*. field -> method | . Cradle. -to-Cradle . Design. . Douglas H. Fisher . Vanderbilt University. douglas.h.fisher@. vanderbilt.edu. Mary Lou Maher . University of Maryland, College Park. marylou.maher@. gmail.com. Presentation to the . . 2. . Regular Languages. 3. . Regular Languages. Context-Free Languages. 4. Context-Free Languages. Pushdown. Automata. Context-Free. Grammars. stack. automaton. 5. Context-Free Grammars. . 6. Grammars. some slides adapted from Ray Mooney. Admin. Assignment 3 out: due next Monday. Quiz #1. Context free grammar. S . . NP VP. left hand side. (single symbol). right hand side. (one or more symbols). some slides adapted from Ray Mooney. Admin. Assignment 3 out today: due next Wednesday. Quiz. Context free grammar. S . . NP VP. left hand side. (single symbol). right hand side. (one or more symbols). some slides adapted from Ray Mooney. Admin. Assignment 3 out today: due next Monday. Quiz. Context free grammar. S . . NP VP. left hand side. (single symbol). right hand side. (one or more symbols).

Download Document

Here is the link to download the presentation.
"Grammars, Derivations"The content belongs to its owner. You may download and print it for personal use, without modification, and keep all copyright notices. By downloading, you agree to these terms.