In geometry, a gnomon is a plane figure formed by removing a similar parallelogram from a corner of a larger parallelogram; or, more generally, a figure that, added to a given figure, makes a larger figure of the same shape. (Wikipedia).
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From playlist SciShow Kids
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
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
From Sundials to Crystals: A Brief History of Timekeeping
How did early humans keep time, and what exactly is a "leap second?" Join Michael Aranda on SciShow as we dive into the long and strange history of timekeeping. Let's go! ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out
From playlist SciShow Infusion
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
To learn more about Wolfram Technology Conference, please visit: https://www.wolfram.com/events/technology-conference/ Speaker: Paritosh Mokhasi Wolfram developers and colleagues discussed the latest in innovative technologies for cloud computing, interactive deployment, mobile devices,
From playlist Wolfram Technology Conference 2017
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.
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
The Golden Ratio: Is It Myth or Math?
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From playlist Be Smart - LATEST EPISODES!
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
