Formal languages

Two-level grammar

A two-level grammar is a formal grammar that is used to generate another formal grammar [1], such as one with an infinite rule set [2]. This is how a Van Wijngaarden grammar was used to specify Algol 68 [3]. A context free grammar that defines the rules for a second grammar can yield an effectively infinite set of rules for the derived grammar. This makes such two-level grammars more powerful than a single layer of context free grammar, because generative two-level grammars have actually been shown to be Turing complete. Two-level grammar can also refer to a formal grammar for a two-level formal language, which is a formal language specified at two levels, for example, the levels of words and sentences. (Wikipedia).

Video thumbnail

4 Types of Sentences | English Grammar for Beginners | Basic English | ESL

There are 4 types of sentences to express all the things you want to say. They are Declarative Sentences Interrogative Sentences Imperative Sentences and Exclamatory Sentences. In this video, we give examples of each kind of sentence, as well as the types of punctuation marks you need t

From playlist It Starts With Literacy

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

SYN106 - The Sentence I

It is usually assumed that the sentence is the highest-ranking unit of syntax. However, not all sentences are structurally complete. For this reason, a distinction is drawn between two sentence types: minor and major sentences. This clip discusses the central properties of these two senten

From playlist VLC201 - The Structure of English

Video thumbnail

What are Nouns? English Grammar for Beginners | Basic English | ESL

You've all heard that a noun is a "person, place, or thing." But sometimes it gets a little harder to tell. Here's a simple trick to try: the "it" test. You have great ideas. But no one will know about them if you can't communicate effectively! Our series of English Grammar Basics will

From playlist It Starts With Literacy

Video thumbnail

A10 Example problem of multiplicity three

An example problem of multiplicity three.

From playlist A Second Course in Differential Equations

Video thumbnail

the C language (part 2 of 5)

Introduction to the C programming language. Part of a larger series teaching programming. See http://codeschool.org

From playlist The C language

Video thumbnail

English Grammar Basics: Its vs It's

It's easy to confuse the words "its" and "it's." Which word should you use? Think about if you can expand the word to say "it is" or "it has." If your sentence still makes sense, then you need that apostrophe! You may also like There, their, and they're http://bit.ly/21I6MaN Me, Myse

From playlist It Starts With Literacy

Video thumbnail

ADVERBS OF DEGREE - ENGLISH GRAMMAR

Adverbs of degree are words that describe or modify adjectives or adverbs. They are a special type of adverb, so I don't really like to think of them as adverbs. They are best on their own category. These are also called intensifiers or qualifiers. If you want to support the channel, hit

From playlist English Grammar

Video thumbnail

DEFINITE AND INDEFINITE ARTICLES - ENGLISH GRAMMAR

We discuss the indefinite articles a, an, and definite article the. 'the' is used when a noun exists and is unique. 'a' or 'an' is used for non-specific nouns. 'a' is used before words that start with a consonant sound. 'an' is used before words that start with a vowel sound. If you want

From playlist English Grammar

Video thumbnail

CS105: Introduction to Computers | 2021 | Lecture 7.4 Intro to HTML: Grammar & Vocabulary Rules

Patrick Young Computer Science, PhD This course is a survey of Internet technology and the basics of computer hardware. You will learn what computers are and how they work and gain practical experience in the development of websites and an introduction to programming. To follow along wi

From playlist Stanford CS105 - Introduction to Computers Full Course

Video thumbnail

MAE915_Assessing Speaking (Practice)_14Oct2021

To support the channel, I would like to invite you to join this channel to get access to perks: https://www.youtube.com/channel/UCfu2GCdjq50W-kL-cv3rcLw/join

From playlist Language Assessment & Technology

Video thumbnail

Python - Building Feature Grammars Part 1

Lecturer: Dr. Erin M. Buchanan Summer 2019 https://www.patreon.com/statisticsofdoom This chapter covers how to write your own feature grammar using Python and nltk. You will learn what a feature grammar is, the ins and outs of how to define features and their components, and how to write

From playlist Natural Language Processing

Video thumbnail

Ruby on Ales 2015 - Time flies like an arrow, fruit flies like a banana by Hsing-Hui Hsu

How do we make sense of a regular sentence, especially when they take us down the "garden path"? For example, when we see a sentence that starts with "The old man," most of us would expect the next word to be a verb. So when we read, "The old man the boat," we have to backtrack to re-evalu

From playlist Ruby on Ales 2015

Video thumbnail

CFGs and NPDMs

Theory of Computation 8. CFGs and NPDMs ADUni

From playlist [Shai Simonson]Theory of Computation

Video thumbnail

Compiler Design | L - 9 | Operator grammar & Operator precedence parser | CS/IT #RavindrababuRaula

Click for free access to Educator's best classes: : https://www.unacademy.com/a/Best-Classes-of-all-time-by-Vishvadeep-Gothi-CS.html For regular updates follow : https://unacademy.com/community/Q3ZGJY/ To purchase please click : https://unacademy.onelink.me/081J/zv9co3u1

From playlist Compiler Design

Video thumbnail

CFLs and compilers

Theory of Computation 6. CFLs and compilers ADUni

From playlist [Shai Simonson]Theory of Computation

Video thumbnail

Computation Ep25, Stacks and CFGs (Apr 5, 2022)

This is a recording of a live class for Math 3342, Theory of Computation, an undergraduate course for math and computer science majors at Fairfield University, Spring 2022. The course is about finite automata, Turing machines, and related topics. Homework and handouts at the class websi

From playlist Math 3342 (Theory of Computation) Spring 2022

Video thumbnail

ElixirConf 2015 - The road to intellij-elixir 1.0.0 By Luke Imhoff

Learn how naively copying a grammar file from one parser generator to another won't work. Go back to the beginning and learn about lexers vs parsers, but discover that the power of interpolation changes the computational complexity and forces the lexer to be a push-down automata instead of

From playlist ElixirConf 2015

Video thumbnail

RubyConf 2015 - Time flies like an arrow; Fruit flies like a banana... by Hsing-Hui Hsu

Time flies like an arrow; Fruit flies like a banana: Parsers for Great Good by Hsing-Hui Hsu When you type print "Hello, world!", how does your computer know what to do? Humans are able to naturally parse spoken language by analyzing the role and meaning of each word in context of its sen

From playlist RubyConf 2015

Video thumbnail

What are Adjectives? English Grammar for Beginners | Basic English | ESL

An adjective tells you something about a noun: which one, what kind, or how many. We also say an adjective "modifies" a noun. If you're looking for our video about Adverbs, click here: http://bit.ly/2mCFedV You have great ideas. But no one will know about them if you can't communicat

From playlist It Starts With Literacy

Related pages

Formal grammar | Attribute grammar | Formal language | Affix grammar | Van Wijngaarden grammar