Formal languages

Van Wijngaarden grammar

In computer science, a Van Wijngaarden grammar (also vW-grammar or W-grammar) is a two-level grammar which provides a technique to define potentially infinite context-free grammars in a finite number of rules. The formalism was invented by Adriaan van Wijngaarden. to define rigorously some syntactic restrictions which previously had to be formulated in natural language, despite their essentially syntactical content. Typical applications are the treatment of gender and number in natural language syntax and the well-definedness of identifiers in programming languages. For example, "there is one person" and "there are two people" are both grammatically correct but "there are one person" is incorrect for context-sensitive reasons that a W-grammar could represent. The technique was used and developed in the definition of the programming language ALGOL 68. It is an example of the larger class of affix grammars. (Wikipedia).

Video thumbnail

Probability & Statistics (1 of 62) Introduction

Visit http://ilectureonline.com for more math and science lectures! In this video I will introduce the basic definitions and nomenclature of probability and statistics. Next video in series: http://youtu.be/GY86lxlWWbM

From playlist Michel van Biezen: PROBABILITY & STATISTICS 1 BASICS

Video thumbnail

SYN103 - Grammar (Overview)

There is a great deal of confusion about the term 'grammar'. Most people associate with it a book written about a language. In fact, there are various manifestations of this traditional term: presecriptive, descriptive and reference grammar. In theoretical linguistics, grammars are theory

From playlist VLC107 - Syntax: Part II

Video thumbnail

Probability & Statistics (6 of 62) De Morgan's Law Explained

Visit http://ilectureonline.com for more math and science lectures! In this video I will explain De Morgan's Laws. Next video in series: http://youtu.be/ZuuXPW36OYU

From playlist Michel van Biezen: PROBABILITY & STATISTICS 1 BASICS

Video thumbnail

Lou van den Dries 5/22/15 Part 1

Title: Differential-Henselian Fields

From playlist Spring 2015

Video thumbnail

B. L. van der Waerden's life before Quantum Mechanics

In this video I speak about the early life of Bartel Leendert van der Waerden, from the university to Amsterdam, over Göttingen and Groningen. This covers Martina R. Schneider's book "Zwischen zwei Disziplinen", the content from about page 70 to 120. Here' some notes as .md file: https://

From playlist Physics

Video thumbnail

Physics - Thermodynamics 2: Ch 32.1 Def. and Terms (18 of 25) The van der Waals Eqn Interperted 2

Visit http://ilectureonline.com for more math and science lectures! In this video I will explain how the parameters change in van der Waals equation: example 2. Next video in this series can be seen at: https://youtu.be/k1mDmRPxpsY

From playlist PHYSICS 32.1 THERMODYNAMICS 2 BASIC TERMS

Video thumbnail

Mod-01 Lec-39 Discourse

Introduction to Modern Linguistics by Prof.Shreesh Chaudhary & Prof. Rajesh Kumar,Department of Humanities and Social Sciences,IIT Madras.For more details on NPTEL visit http://nptel.ac.in

From playlist IIT Madras: Introduction to Modern Linguistics | CosmoLearning.org English Language

Video thumbnail

Presuppositionalism and Natural Theology: A Critical Analysis

A guest reading by Riverrun of "Presuppositionalism and Natural Theology: A Critical Analysis of the Presuppositional Challenge to Natural Theology" by Prof. David Haines. Full text: https://www.academia.edu/17323489/PRESUPPOSITIONALISM_AND_NATURAL_THEOLOGY

From playlist Philosophy

Video thumbnail

Writing a PEG Parser For Fun and Profit

Parsing Expression Grammars (PEGs) are a relatively new formalism for describing grammars suitable for automatically generating efficient parsers. I've become interested in using a PEG-generated parser as an alternative to CPython's nearly 30 year old "pgen" parser generator. This poses so

From playlist Python

Video thumbnail

How to Learn a Foreign Language - Study Tips - Language Learning

Hello Socratica Friends! We're here to help you be a Great Student. How to Learn a Foreign Language is one of our favourite subjects. Our host Liliana speaks English, Spanish, Portuguese, and Italian - and she’s agreed to share some of her top tips for learning a second language. We disc

From playlist It Starts With Literacy

Video thumbnail

Numerical simulations of highly turbulent flows (Part 2) by Richard Stevens

Summer school and Discussion Meeting on Buoyancy-driven flows DATE: 12 June 2017 to 20 June 2017 VENUE: Ramanujan Lecture Hall, ICTS, Bengaluru Buoyancy plays a major role in the dynamics of atmosphere and interiors of planets and stars, as well as in engineering applications. This field

From playlist Summer school and Discussion Meeting on Buoyancy-driven flows

Video thumbnail

Area between curves | Applications of definite integrals | AP Calculus AB | Khan Academy

By integrating the difference of two functions, you can find the area between them. Created by Sal Khan. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/ap-calculus-ab/ab-applications-definite-integrals/ab-vertical-area/e/area-between-two-curve

From playlist Applications of integration | AP Calculus AB | Khan Academy

Video thumbnail

Change in centripetal acceleration from change in linear velocity and radius: Worked examples

A worked example finding the change in centripetal acceleration from the change in linear speed, and an example finding the change in centripetal acceleration from the change in radius. View more lessons or practice this subject at https://www.khanacademy.org/science/ap-physics-1/ap-centr

From playlist Uniform circular motion and gravitation | AP Physics 1 | Khan Academy

Video thumbnail

What Makes Python Python? (aka Everything About Python’s Grammar)

We will try to answer a straightforward question: What makes Python so easy to learn and read? Other languages also have a robust community and a compelling ecosystem and standard library, but Python somehow stands out on how easy it is to understand existing code and how quickly and pleas

From playlist Python

Video thumbnail

Algebra by B.L. van der Waerden

In this video I will show you my two volume set of Algebra by B.L. van der Waerden. These are classic books on Abstract Algebra. Volume 1 https://amzn.to/3HZJL2r Volume 2 https://amzn.to/3vcIXQb Saracino Book https://amzn.to/3Gg0hKt Proof Writing Book: https://amzn.to/3YN5DnN Useful Math

From playlist Book Reviews

Video thumbnail

C9 Lectures: Dr. Erik Meijer - Functional Programming Fundamentals Chapter 10 of 13

In Chapter 10, Declaring Types and Classes, Dr. Meijer teaches us about type declarations, data declarations, arithmetic expressions, etc.

From playlist Haskell - Functional Programming Fundamentals (Dr. Erik Meijer )

Video thumbnail

Learning From the Best: Writing an Effective Story Opening

Today we look at the opening of Ian McEwan's novel 'Enduring Love'. McEwan manages to introduce character and setting, whilst also compelling the reader to read on. Buy my revision guides in paperback on Amazon*: Mr Bruff’s Guide to GCSE English Language https://amzn.to/2GvPrTV Mr Bruf

From playlist AQA English Language Paper 1

Video thumbnail

How the DUTCH Changed the English Language

Get the exclusive NordVPN deal here at https://nordvpn.com/letthemtalktv. It's risk-free with NordVPN's 30-day money-back guarantee! In this video you'll discover the extraordinary influence of the Dutch and Flemish on the English Language. Well delve into the history, which includes a l

From playlist History of the English Language

Related pages

Compiler Description Language | Prolog | Context-sensitive grammar | Undecidable problem | Attribute grammar | String generation | Two-level grammar | Q-systems | Extended Backus–Naur form | Recursively enumerable language | Parse tree | Affix grammar | Context-free grammar | Backus–Naur form