Constructivism (mathematics) | Intuitionism

Harrop formula

In intuitionistic logic, the Harrop formulae, named after , are the class of formulae inductively defined as follows: * Atomic formulae are Harrop, including falsity (βŠ₯); * is Harrop provided and are; * is Harrop for any well-formed formula ; * is Harrop provided is, and is any well-formed formula; * is Harrop provided is. By excluding disjunction and existential quantification (except in the antecedent of implication), non-constructive predicates are avoided, which has benefits for computer implementation. From a constructivist point of view, Harrop formulae are "well-behaved." For example, in Heyting arithmetic, Harrop formulae satisfy a classical equivalence not usually satisfied in constructive logic: Harrop formulae were introduced around 1956 by Ronald Harrop and independently by Helena Rasiowa. Variations of the fundamental concept are used in different branches of constructive mathematics and logic programming. (Wikipedia).

Video thumbnail

Quadratic Formula: Solve x^2 – bx + c = 0 (Grade 7) - OnMaths GCSE Maths Revision

Topic: Quadratic Formula: Solve x^2 – bx + c = 0 Do this paper online for free: https://www.onmaths.com/quadratic-formula/ Grade: 7 This question appears on calculator higher GCSE papers. Practise and revise with OnMaths. Go to onmaths.com for more resources, like predicted GCSE Maths Pap

From playlist Quadratic Formula

Video thumbnail

First Spitfire Kill - The Battle of Barking Creek 1939

Find out the tragic story of the first aerial combat involving the Spitfire three days into WWII, and the terrible consequences that followed. Help support my channel: https://www.paypal.me/markfeltonproduction https://www.patreon.com/markfeltonproductions Disclaimer: All opinions and co

From playlist Aircraft

Video thumbnail

Solve a Bernoulli Differential Equation Initial Value Problem

This video provides an example of how to solve an Bernoulli Differential Equations Initial Value Problem. The solution is verified graphically. Library: http://mathispower4u.com

From playlist Bernoulli Differential Equations

Video thumbnail

How to solve a quadratic using the quadratic formula

πŸ‘‰ Learn how to solve quadratic equations using the quadratic formula. A quadratic equation is an equation whose highest power on its variable(s) is 2. The quadratic formula is a formula which can be used to find the roots of (solve) a quadratic equation. The quadratic formula is given by

From playlist Solve by Quadratic Formula | ax^2+bx+c

Video thumbnail

How to determine sine of a half angle using the formula

πŸ‘‰ Learn how to evaluate the Sine of an angle using the half-angle formula. The half-angle formula for Sine is helpful when you need to determine the exact value of function given an angle but cannot use a calculator or the angle is not on the unit circle. To evaluate all we need to do is

From playlist Half Angle Formulas

Video thumbnail

Solve a Bernoulli Differential Equation (Part 2)

This video provides an example of how to solve an Bernoulli Differential Equation. The solution is verified graphically. Library: http://mathispower4u.com

From playlist Bernoulli Differential Equations

Video thumbnail

Am I only streaming? Thinking reactive - Rob Harrop

In 1978, Tony Hoare presented communicating sequential processes (CSP) to the world. Systems envisioned by CSP are composed of sequential processes that communicate via message passing. In 1973, Hewitt, Bishop, and Steiger introduced the actor model to the world. Actors, like processes in

From playlist O'Reilly Software Architecture Conference 2016 - London, United Kingdom

Video thumbnail

Ex: Solve a Bernoulli Differential Equation Using Separation of Variables

This video explains how to solve a Bernoulli differential equation. http://mathispower4u.com

From playlist Bernoulli Differential Equations

Video thumbnail

How To Discover A New Planet (Science Out Loud S1 Ep1)

Thousands of planets - ones that look totally different than what we're used to (and could host life!) - exist outside of our solar system. But we're only just now starting to find them! Ashley takes you behind the simple technique that astronomers have been using to discover these curious

From playlist Science Out Loud

Video thumbnail

Binet's formula | Lecture 5 | Fibonacci Numbers and the Golden Ratio

Derivation of Binet's formula, which is a closed form solution for the Fibonacci numbers. Join me on Coursera: https://www.coursera.org/learn/fibonacci Lecture notes at http://www.math.ust.hk/~machas/fibonacci.pdf Subscribe to my channel: http://www.youtube.com/user/jchasnov?sub_confir

From playlist Fibonacci Numbers and the Golden Ratio

Video thumbnail

Steaming Gun | MIT Chemistry Behind the Magic

MIT Chemistry Behind the Magic View the complete course: http://ocw.mit.edu/behindthemagic Instructor: John Dolhuh, Jessica Harrop License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu WARNING NOTICE: The experiments described

From playlist MIT Chemistry Behind the Magic

Video thumbnail

High Street 2012. Part Two

A detailed account of the management of a series of projects linking Aldgate in the City of London, with the site of the Olympics in Stratford Formerly with the London Mayor's Architecture and Urbanism Unit, Paul Harper has been involved with the 100 Spaces Project, the Great Spaces Projec

From playlist Urban Design Group: Introduction to Urban Design

Video thumbnail

Equations & Formulas

More resources available at www.misterwootube.com

From playlist Basic Equations

Video thumbnail

Describe and solve for the zeros using quadratic formula

πŸ‘‰ Learn how to solve quadratic equations using the quadratic formula. A quadratic equation is an equation whose highest power on its variable(s) is 2. The quadratic formula is a formula which can be used to find the roots of (solve) a quadratic equation. The quadratic formula is given by

From playlist Solve by Quadratic Formula | x^2+bx+c

Video thumbnail

Briggs-Rauscher Reaction | MIT Chemistry Behind the Magic

MIT Chemistry Behind the Magic View the complete course: http://ocw.mit.edu/behindthemagic Instructor: John Dolhuh, Jessica Harrop License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu WARNING NOTICE: The experiments described

From playlist MIT Chemistry Behind the Magic

Video thumbnail

Let It Snow | MIT Chemistry Behind the Magic

MIT Chemistry Behind the Magic View the complete course: http://ocw.mit.edu/behindthemagic Instructor: John Dolhuh, Jessica Harrop License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu WARNING NOTICE: The experiments described

From playlist MIT Chemistry Behind the Magic

Video thumbnail

Elements on Fire | MIT Chemistry Behind the Magic

MIT Chemistry Behind the Magic View the complete course: http://ocw.mit.edu/behindthemagic Instructor: John Dolhuh, Jessica Harrop License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu WARNING NOTICE: The experiments described

From playlist MIT Chemistry Behind the Magic

Video thumbnail

Mirror Mirror | MIT Chemistry Behind the Magic

MIT Chemistry Behind the Magic View the complete course: http://ocw.mit.edu/behindthemagic Instructor: John Dolhuh, Jessica Harrop License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu WARNING NOTICE: The experiments described

From playlist MIT Chemistry Behind the Magic

Video thumbnail

Quadratic Formula: Solve x^2 + bx – c = 0 (Grade 7) - OnMaths GCSE Maths Revision

Topic: Quadratic Formula: Solve x^2 + bx – c = 0 Do this paper online for free: https://www.onmaths.com/quadratic-formula/ Grade: 7 This question appears on calculator higher GCSE papers. Practise and revise with OnMaths. Go to onmaths.com for more resources, like predicted GCSE Maths Pap

From playlist Quadratic Formula

Video thumbnail

Bringin' Home the Bacon | MIT Chemistry Behind the Magic

MIT Chemistry Behind the Magic View the complete course: http://ocw.mit.edu/behindthemagic Instructor: John Dolhuh, Jessica Harrop License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu WARNING NOTICE: The experiments described

From playlist MIT Chemistry Behind the Magic

Related pages

Realizability | Logic programming | Intuitionistic logic | Heyting arithmetic | Horn clause | Antecedent (logic) | Ξ›Prolog