Theory of computation | Formal languages | Rewriting systems
In theoretical computer science and mathematical logic a string rewriting system (SRS), historically called a semi-Thue system, is a rewriting system over strings from a (usually finite) alphabet. Given a binary relation between fixed strings over the alphabet, called rewrite rules, denoted by , an SRS extends the rewriting relation to all strings in which the left- and right-hand side of the rules appear as substrings, that is , where , , , and are strings. The notion of a semi-Thue system essentially coincides with the presentation of a monoid. Thus they constitute a natural framework for solving the word problem for monoids and groups. An SRS can be defined directly as an abstract rewriting system. It can also be seen as a restricted kind of a term rewriting system. As a formalism, string rewriting systems are Turing complete. The semi-Thue name comes from the Norwegian mathematician Axel Thue, who introduced systematic treatment of string rewriting systems in a 1914 paper. Thue introduced this notion hoping to solve the word problem for finitely presented semigroups. Only in 1947 was the problem shown to be undecidable— this result was obtained independently by Emil Post and A. A. Markov Jr. (Wikipedia).
Math: Partial Differential Eqn. - Ch.1: Introduction (1 of 42) What is a Partial Differential Eqn?
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what is a partial differential equation. PDE is a differential equation that contains partial derivatives, and the dependent variable in the equation depends on more than 1 independent variab
From playlist PARTIAL DIFFERENTIAL EQNS CH1 INTRODUCTION
Partial derivatives | Appendix E | Differential Equations for Engineers
Definition of the partial derivative. Join me on Coursera: https://www.coursera.org/learn/differential-equations-engineers Lecture notes at http://www.math.ust.hk/~machas/differential-equations-for-engineers.pdf Subscribe to my channel: http://www.youtube.com/user/jchasnov?sub_confirmat
From playlist Differential Equations for Engineers
Calculus 3: Partial Derivative (24 of 50) The Chain Rule
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain and demonstrate the difference between “regular” derivatives of y=f(x) where x=f(t), and z=f(x,y) where x=x(t) and y=y(t) using the chain rule (method 1). Next video in the series can be seen
From playlist CALCULUS 3 CH 4 PARTIAL DERIVATIVES
The Infinite Game of Chess (with Outray Chess)
An infinite game of chess with the Thue-Morse sequence. To avoid an infinite game of chess there was a rule that declared that a game would end if any sequence of moves were repeated three times in a row. However Dutch mathematician Max Euwe showed that the Thue-Morse sequence can define
From playlist My Maths Videos
Arne Martin Aurlien: Implement an Esoteric Programming Language for Fun | JSConf EU 2014
Inside most of us there’s a befunge programmer who wants to come out. When doing day-to-day “serious” programming it is usually a good idea to keep them as firmly locked up as possible. Let’s ignore that instinct for a little while. In this talk I’ll try to convince you why you should try
From playlist JSConf EU 2014
Koch Curve from Thue-Morse Turtle Graphics
This video shows the first 65536 steps of the turtle graphics construction of the Koch curve using the Thue-Morse sequence. To learn more about some of the amazing properties of Thue-Morse sequence, see this longer video: https://youtu.be/yqEIhdnfJxE.. #numbertheory #turtlegraphics ______
From playlist Fractals
The Thue-Morse Sequence (with visualizations)
In this video, we introduce the Prouhet-Thue-Morse sequence, which is a binary sequence. We discuss three methods to construct the sequence and then investigate some of the sequence's properties (including why it is the "fair sharing" sequence, the overlap-free property, its connection to
From playlist Fractals
Calculus 3: Partial Derivative (28 of 50) The Chain Rule (Type 3)
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain another method (3) of finding the partial derivative of z=f(x,y) where x=x(u,v) and y=y(u,v). Next video in the series can be seen at: https://youtu.be/krSASQ48tPo
From playlist CALCULUS 3 CH 4 PARTIAL DERIVATIVES
Arul Shankar, Ordering elliptic curves by conductor
VaNTAGe seminar, on Oct 27, 2020 License: CC-BY-NC-SA. Closed captions provided by Rachana Madhukara.
From playlist Rational points on elliptic curves
Volker Diekert: Recognizable languages are Church-Rosser congruential
Find this video and other talks given by worldwide mathematicians on CIRM's Audiovisual Mathematics Library: http://library.cirm-math.fr. And discover all its functionalities: - Chapter markers and keywords to watch the parts of your choice in the video - Videos enriched with abstracts, b
From playlist SPECIAL 7th European congress of Mathematics Berlin 2016.
Hugh Montgomery: Moments of a Thue-Morse generating function
Find this video and other talks given by worldwide mathematicians on CIRM's Audiovisual Mathematics Library: http://library.cirm-math.fr. And discover all its functionalities: - Chapter markers and keywords to watch the parts of your choice in the video - Videos enriched with abstracts, b
From playlist Number Theory
MATH2018 Lecture 1.1. Partial Differentiation
We introduce partial derivatives, which allow us to calculate the rate of change of functions of several variables.
From playlist MATH2018 Engineering Mathematics 2D
Partial Implicit Differentiation
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From playlist Functions of Several Variables - Calculus
Walking the Dragon and Koch Curves with a Turtle (131072 steps each!)
In this video, we describe two how to draw two amazing curves - the Dragon curve and the Koch curve - using the simple process of Turtle graphics. For both curves, we draw 131072 line segments (this is 2 to the 17th power). It is amazing that such a simple process can draw these complex cu
From playlist Fractals
Partial Derivative of z = cos(xy)
Partial Derivative of z = cos(xy) If you enjoyed this video please consider liking, sharing, and subscribing. You can also help support my channel by becoming a member https://www.youtube.com/channel/UCr7lmzIk63PZnBw3bezl-Mg/join Thank you:)
From playlist Partial Derivatives
Calculus 3: Partial Derivative (29 of 50) The Chain Rule (Type 3): Example 1
Visit http://ilectureonline.com for more math and science lectures! In this video I will find the partial derivative of z=e^(xy) where x=2u+v and y=u/v using the chain rule. Next video in the series can be seen at: https://youtu.be/Q_mPcNYA7FI
From playlist CALCULUS 3 CH 4 PARTIAL DERIVATIVES
Partial Derivative with Chain Rule w = xyz, x = s + 2t, y = s - 2t, z = st^2
Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Partial Derivative with Chain Rule w = xyz, x = s + 2t, y = s - 2t, z = st^2
From playlist Calculus
Is Meat Bad for You? Is Meat Unhealthy?
The first 1000 people to use this link will get a 2 month free trial of Skillshare: https://skl.sh/kurzgesagt6 Sources: https://sites.google.com/view/sourcesismeathealthy/ Over the last few years eating meat has increasingly been associated with health risks, like heart disease, cancer a
From playlist Medicine & Biology
Partial Derivatives of z =e^(xy)
Partial Derivatives of z =e^(xy) If you enjoyed this video please consider liking, sharing, and subscribing. You can also help support my channel by becoming a member https://www.youtube.com/channel/UCr7lmzIk63PZnBw3bezl-Mg/join Thank you:)
From playlist Partial Derivatives
Michael Drmota: Automatic sequences along squares and primes
Find this video and other talks given by worldwide mathematicians on CIRM's Audiovisual Mathematics Library: http://library.cirm-math.fr. And discover all its functionalities: - Chapter markers and keywords to watch the parts of your choice in the video - Videos enriched with abstracts, b
From playlist Number Theory