A syntactic predicate specifies the syntactic validity of applying a production in a formal grammar and is analogous to a semantic predicate that specifies the semantic validity of applying a production. It is a simple and effective means of dramatically improving the recognition strength of an LL parser by providing arbitrary lookahead. In their original implementation, syntactic predicates had the form “( α )?” and could only appear on the left edge of a production. The required syntactic condition α could be any valid context-free grammar fragment. More formally, a syntactic predicate is a form of production intersection, used in parser specifications or in formal grammars. In this sense, the term predicate has the meaning of a mathematical indicator function. If p1 and p2, are production rules, the language generated by both p1 and p2 is their set intersection. As typically defined or implemented, syntactic predicates implicitly order the productions so that predicated productions specified earlier have higher precedence than predicated productions specified later within the same decision. This conveys an ability to disambiguate ambiguous productions because the programmer can simply specify which production should match. Parsing expression grammars (PEGs), invented by Bryan Ford, extend these simple predicates by allowing "not predicates" and permitting a predicate to appear anywhere within a production. Moreover, Ford invented packrat parsing to handle these grammars in linear time by employing memoization, at the cost of heap space. It is possible to support linear-time parsing of predicates as general as those allowed by PEGs, but reduce the memory cost associated with memoization by avoiding backtracking where some more efficient implementation of lookahead suffices. This approach is implemented by ANTLR version 3, which uses Deterministic finite automata for lookahead; this may require testing a predicate in order to choose between transitions of the DFA (called "pred-LL(*)" parsing). (Wikipedia).
Introduction to Predicate Logic
This video introduces predicate logic. mathispower4u.com
From playlist Symbolic Logic and Proofs (Discrete Math)
SYN_020 - Linguistic Micro-Lectures: Syntactic Trees
In this short micro-lecture, Aaron Cook, one of Prof. Handke's students, discusses the notion of the "syntactic tree", a central concept in syntax.
From playlist Micro-Lectures - Syntax
This video contains solutions to sample problems involving predicates. This includes: * Finding which elements of a domain make a predicate true * Determining whether a quantified statement is true or false
From playlist Discrete Mathematics
An Overview of Predicate Logic for Linguists - Semantics in Linguistics
This video covers predicate logic in #semantics for #linguistics. We talk about predicates, quantifiers (for all, for some), how to translate sentences into predicate logic, scope, bound variables, free variables, and assignment functions. Join this channel to get access to perks: https:/
From playlist Semantics in Linguistics
Predicates and their Truth Sets
A predicate is a sentence that depends on the value of a variable. For instance, "x is greater than 3". If you tell me a specific value of x, like 7 or 2, then the predicate becomes a logical statement which is either true or false. The Truth Set of a predicate is all of the values of the
From playlist Discrete Math (Full Course: Sets, Logic, Proofs, Probability, Graph Theory, etc)
SYN_028 - The Predicate (in Syntax)
In this short micro-lecture, Antonia Eisermann, one of Prof. Handke's students, discusses the significance and the role of the predicate in PDE grammar.
From playlist Micro-Lectures - Syntax
SEM_019 - Linguistic Micro-Lectures: Predications and Predicates
What are predicates and in what way are they related to predications? Within less than two minutes Prof. Handke explains the central machinery of predicate logic. (Optional Spanish subtitles by Andrea Yaques, Lima, Peru)
From playlist Micro-Lectures - Semantics
1.5.1 Predicate Logic 1: Video
MIT 6.042J Mathematics for Computer Science, Spring 2015 View the complete course: http://ocw.mit.edu/6-042JS15 Instructor: Albert R. Meyer License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 6.042J Mathematics for Computer Science, Spring 2015
This first E-Lecture on Predicate Logic is meant as a gentle introduction. It first points out why propositional logic alone is not sufficient for the formalization of sentence meaning and then introduces the central machinery of predicate logic using several examples with which the studen
From playlist VLC103 - The Nature of Meaning
[LISA] Linguistically-Informed Self-Attention for Semantic Role Labeling | AISC
For more details including paper and slides, visit https://aisc.a-i.science/events/2019-04-25/
From playlist Natural Language Processing
SYN120 - The Verb in PDE, Part I
This first of a series of three E-Lectures discusses the notions verb, verb phrase and verb groups. It also includes the term predicate to arrive at a formal classification of these terms in PDE, which can be used for further analysis.
From playlist VLC201 - The Structure of English
SYN102 - Syntactic Functions in PDE
This introductory E-Lecture, which is part of our series "The Structure of English", discusses the central syntactic functional elements of clause structure in PDE. It serves as an overview, i.e. as a first approach towards a functional analysis of PDE clause structure.
From playlist VLC107 - Syntax: Part II
Topos seminar Lecture 15: Abstraction and adjunction (Part 1)
I begin by explaining in a simple example the connection between formal reasoning involving distinct concepts, and adjunctions between classifying topoi. This leads to a discussion of models in topoi (focused on the particular example of the theory of abelian groups) then to the syntactic
From playlist Topos theory seminar
Computational Semantics: How Computers Know what Words Mean [Lecture]
This is a single lecture from a course. If you you like the material and want more context (e.g., the lectures that came before), check out the whole course: https://boydgraber.org/teaching/CMSC_723/ (Including homeworks and reading.) Music: https://soundcloud.com/alvin-grissom-ii/review
From playlist Computational Linguistics I
This video lists an explains propositional, predicate calculus axioms, as well as a set theoretical statement that goes with it, including ZF and beyond. Where possible, the explanations are kept constructive. You can find the list of axioms in the file discussed in this video here: https:
From playlist Logic
Gödel's Incompleteness Theorems: An Informal Introduction to Formal Logic #SoME2
My entry into SoME2. Also, my first ever video. I hope you enjoy. The Book List: Logic by Paul Tomassi A very good first textbook. Quite slow at first and its treatment of first-order logic leaves a little to be desired in my opinion, but very good on context, i.e. why formal logic is im
From playlist Summer of Math Exposition 2 videos
MathZero, The Classification Problem, and Set-Theoretic Type Theory - David McAllester
Seminar on Theoretical Machine Learning Topic: MathZero, The Classification Problem, and Set-Theoretic Type Theory Speaker: David McAllester Affiliation: Toyota Technological Institute at Chicago Date: May 14, 2020 For more video please visit http://video.ias.edu
From playlist Mathematics
Linguistically informed NLP for healthcare experience data | Healthcare NLP Summit 2021
Get your Free Spark NLP and Spark OCR Free Trial: https://www.johnsnowlabs.com/spark-nlp-try-free/ Register for NLP Summit 2021: https://www.nlpsummit.org/2021-events/ Watch all Healthcare NLP Summit 2021 sessions: https://www.nlpsummit.org/ Investigation of attention mechanisms of BER
From playlist Healthcare NLP Summit 2021
Pre-Calculus - Vocabulary of functions
This video describes some of the vocabulary used with functions. Specifically it covers what a function is as well as the basic idea behind its domain and range. For more videos visit http://www.mysecretmathtutor.com
From playlist Pre-Calculus - Functions
Lecture 7B: Metacircular Evaluator, Part 2
MIT 6.001 Structure and Interpretation of Computer Programs, Spring 2005 Instructor: Harold Abelson, Gerald Jay Sussman, Julie Sussman View the complete course: https://ocw.mit.edu/6-001S05 YouTube Playlist: https://www.youtube.com/playlist?list=PLE18841CABEA24090 Metacircular Evaluator,
From playlist MIT 6.001 Structure and Interpretation, 1986