Euclidean geometry | Theorems about quadrilaterals

Theorem of the gnomon

The theorem of the gnomon states that certain parallelograms occurring in a gnomon have areas of equal size. (Wikipedia).

Theorem of the gnomon
Video thumbnail

Proof that if g o f is Surjective(Onto) then g is Surjective(Onto)

Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Proof that if g o f is Surjective(Onto) then g is Surjective(Onto). Given two functions f : A to B and g: B to C, we prove that if the composition g o f: A to C is a surjective function then g is also surjective function.

From playlist Proofs

Video thumbnail

(ML 19.2) Existence of Gaussian processes

Statement of the theorem on existence of Gaussian processes, and an explanation of what it is saying.

From playlist Machine Learning

Video thumbnail

Calculus 5.3 The Fundamental Theorem of Calculus

My notes are available at http://asherbroberts.com/ (so you can write along with me). Calculus: Early Transcendentals 8th Edition by James Stewart

From playlist Calculus

Video thumbnail

Theory of numbers: Congruences: Euler's theorem

This lecture is part of an online undergraduate course on the theory of numbers. We prove Euler's theorem, a generalization of Fermat's theorem to non-prime moduli, by using Lagrange's theorem and group theory. As an application of Fermat's theorem we show there are infinitely many prim

From playlist Theory of numbers

Video thumbnail

Second Isomorphism Theorem for Groups Proof

Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Second Isomorphism Theorem for Groups Proof. If G is a group and H and K are subgroups of G, and K is normal in G, we prove that H/(H n K) is isomorphic to HK/K.

From playlist Abstract Algebra

Video thumbnail

A visual alternating sum!

This is a short, animated visual proof demonstrating the sum of the infinite geometric series with ratio -1/2. For a longer version of this animation (with dramatic music only), check out : https://youtu.be/wLPsEULfPnk This animation is based on a visual proof by Roger B. Nelsen from th

From playlist MathShorts

Video thumbnail

The Algebra of Functions

http://mathispower4u.wordpress.com/

From playlist The Properties of Functions

Video thumbnail

Make Your Own Sundial!

Squeaks broke his watch! Luckily Jessi knows of a handy way to tell time, with a sundial! Hi there! We at SciShow want to learn more about you and your opinions! If you have time, please take a moment to fill out this survey: https://www.surveymonkey.com/r/SciShowSurvey2017 Thank you! --

From playlist SciShow Kids

Video thumbnail

Sum of odd integers: a generalization (visual proof)

This short animated proof demonstrates the classic sum of odds visual proof and then shows one way to extend the idea to finding sums in other polygonal arrays. Surprisingly, the natural extension to finding sums of certain entries in a triangular array yields the sequence of squares. We l

From playlist Finite Sums

Video thumbnail

Theory of numbers: Gauss's lemma

This lecture is part of an online undergraduate course on the theory of numbers. We describe Gauss's lemma which gives a useful criterion for whether a number n is a quadratic residue of a prime p. We work it out explicitly for n = -1, 2 and 3, and as an application prove some cases of Di

From playlist Theory of numbers

Video thumbnail

Parametrizing and projecting a sphere | Universal Hyperbolic Geometry 38 | NJ Wildberger

This video introduces stereographic and gnomonic projections of a sphere. We begin by reviewing three dimensional coordinate systems. A rational parametrization of a sphere is analogous to the rational parametrization of a circle found in MathFoundations29. Stereographic projection project

From playlist Universal Hyperbolic Geometry

Video thumbnail

Visual Sum of Cubes III

This is a short, animated (wordless) visual proof demonstrating the sum of the first n positive cubes using overlapping gnomons. #mathshorts​ #mathvideo​ #math​ #calculus #mtbos​ #manim​ #animation​ #theorem​ #pww​ #proofwithoutwords​ #visualproof​ #proof​ #iteachmath #finitesums #discrete

From playlist Finite Sums

Video thumbnail

Alternating Sum Of Squares (visual proof)

This is a short, animated visual proof demonstrating how to visualize the alternating sum of squares. #mathshorts​ #mathvideo​ #math​ #numbertheory #mtbos​ #manim​ #animation​ #theorem​ #pww​ #proofwithoutwords​ #visualproof​ #proof​ #iteachmath #squares #triangularnumbers This animation

From playlist Finite Sums

Video thumbnail

Algebra of the Sun - Russell Goyder

Russell Goyder presents an approach to the "sundial problem" of computing the length of a shadow cast by a stick (gnomon) by the sun at a given latitude at a given time of day, at a given point of the Earth's orbit, using geometric algebra. The webpage for this seminar is https://metauni.

From playlist Anything At All seminar

Video thumbnail

The Golden Ratio: Is It Myth or Math?

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub

From playlist Be Smart - LATEST EPISODES!

Video thumbnail

What Does Earth Look Like?

Follow Michael Stevens: http://www.twitter.com/tweetsauce EXTRA INFO & LINKS BELOW! Dr. Julian Bayliss' rainforest story: http://youtu.be/mni8mSS4KDU Cool video from CGPGrey: "How Many Countries Are There?" http://youtu.be/4AivEQmfPpk upside-down map: http://paulmencke.nl.dualdev.com/wp

From playlist DOT.

Video thumbnail

Galois theory: Discriminants

This lecture is part of an online graduate course on Galois theory. We define the discriminant of a finite field extension, ans show that it is essentially the same as the discriminant of a minimal polynomial of a generator. We then give some applications to algebraic number fields. Corr

From playlist Galois theory

Video thumbnail

Linear congruences

In this video we continue discussing congruences and, in particular, we discuss solutions of linear congruences. The content of this video corresponds to Section 4.4 of my book "Number Theory and Geometry" which you can find here: https://alozano.clas.uconn.edu/number-theory-and-geometry/

From playlist Number Theory and Geometry

Video thumbnail

Illuminating hyperbolic geometry

Joint work with Saul Schleimer. In this short video we show how various models of hyperbolic geometry can be obtained from the hemisphere model via stereographic and orthogonal projection. 2D figure credits: 4:09 Cannon, Floyd, Kenyon, Parry. 0:49, 1:20, 1:31, 2:12, Roice Nelson. We th

From playlist 3D printing

Video thumbnail

Differential Equations | The Convolution Theorem

We prove an important result regarding the interaction of convolution and the Laplace transform. http://www.michael-penn.net http://www.randolphcollege.edu/mathematics/

From playlist Differential Equations

Related pages

Euclid's Elements | Gnomon (figure) | Parallelogram | Area | Parallelepiped | Volume | Euclid | Straightedge and compass construction | Space diagonal