In geometry, the pentagrammic crossed-antiprism is one in an infinite set of nonconvex antiprisms formed by triangle sides and two regular star polygon caps, in this case two pentagrams. It differs from the pentagrammic antiprism by having opposite orientations on the two pentagrams. This polyhedron is identified with the indexed name U80 as a uniform polyhedron. The pentagrammic crossed-antiprism may be inscribed within an icosahedron, and has ten triangular faces in common with the great icosahedron. It has the same vertex arrangement as the pentagonal antiprism. In fact, it may be considered as a parabidiminished great icosahedron. (Wikipedia).
The Origins of Antisemitic Stereotypes | Unpacked
Antisemitism has always been around, but one thing’s for sure: Over the past few years, this centuries-old prejudice has taken on a more violent face in the U.S. This week, we’re unpacking some of the antisemitic ideas we see in America today and trying to identify the conspiracy theories
From playlist Making Sense of Internet Conspiracy Theories
Parallel Lines and Transversals - Geometry
Two lines in a plane that never cross are called parallel lines. Any line which crosses both of the parallel lines is called a transversal. In this video we talk about corresponding angles and vertical angles formed by a transversal. It's important to remember that these results are for
From playlist Geometry lessons
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Why Is Everyone Obsessed With The Illuminati?
Check us out on iTunes! http://dne.ws/1NixUds Please Subscribe! http://testu.be/1FjtHn5 The Illuminati is thought to be controlling the strings of the entire world. But who are they really and how much power do they actually have? + + + + + + + + Previous Episode: Science Says These 6
From playlist Why Are There So Many Conspiracy Theories?
Perfect Shapes in Higher Dimensions - Numberphile
Carlo Sequin talks through platonic solids and regular polytopes in higher dimensions. More links & stuff in full description below ↓↓↓ Extra footage (Hypernom): https://youtu.be/unC0Y3kv0Yk More videos with with Carlo: http://bit.ly/carlo_videos Edit and animation by Pete McPartlan Pete
From playlist Carlo Séquin on Numberphile
Isomorphisms (Abstract Algebra)
An isomorphism is a homomorphism that is also a bijection. If there is an isomorphism between two groups G and H, then they are equivalent and we say they are "isomorphic." The groups may look different from each other, but their group properties will be the same. Be sure to subscribe s
From playlist Abstract Algebra
Chemistry Essentials: What is a covalent bond?
A quick definition of a covalent bond. Chem Fairy: Louise McCartney Director: Michael Harrison Written and Produced by Kimberly Hatch Harrison ♦♦♦♦♦♦♦♦♦♦ Ways to support our channel: ► Join our Patreon : https://www.patreon.com/socratica ► Make a one-time PayPal donation: https://www
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Energy minimization by Abhinav Kumar
DISCUSSION MEETING SPHERE PACKING ORGANIZERS: Mahesh Kakde and E.K. Narayanan DATE: 31 October 2019 to 06 November 2019 VENUE: Madhava Lecture Hall, ICTS Bangalore Sphere packing is a centuries-old problem in geometry, with many connections to other branches of mathematics (number the
From playlist Sphere Packing - 2019
Chemistry 107. Inorganic Chemistry. Lecture 22.
UCI Chemistry: Inorganic Chemistry (Fall 2014) Lec 22. Inorganic Chemistry -- Coordination Chemistry I: Coordination Geometries View the complete course: http://ocw.uci.edu/courses/chem_107_inorganic_chemistry.html Instructor: Alan F. Heyduk. License: Creative Commons CC-BY-SA Terms of Us
From playlist Chem 107: Week 8
Thin Groups and Applications - Alex Kontorovich
Analysis and Beyond - Celebrating Jean Bourgain's Work and Impact May 21, 2016 More videos on http://video.ias.edu
From playlist Analysis and Beyond
Differences between pentecostalism and fundamentalist Islam
David Martin responds to a student question about the rise on Pentecostalism, which is based on mobility and accessibility, and Fundamentalist Islam.
From playlist Faith and Globalization
Introduction to Antihistamines
Everybody knows what allergies are, but what causes them? What drugs do we have available to address them? As we learned in the immunology series, allergies are symptoms of an immune response to a perceived threat. Histamine is a molecule in the body that orchestrates many aspects of this
From playlist Pharmacology
Dangers of Dihydrogen Monoxide - The Less You Know 471
To learn how you can help in the fight against Dihydrogen Monoxide check out http://www.stevespanglerscience.com/dhmo.html
From playlist April Fool's Day Favorites
The Cross Product and Meister's Formula | Algebraic Calculus One | Wild Egg
In this lecture, we introduce the cross product of two planar vectors: a somewhat novel notion that allows us to establish the signed area notion for general triangles. We are touching base with linear algebraic ideas here in establishing the linearity and skew-symmetric properties of the
From playlist Algebraic Calculus One from Wild Egg
Linear Algebra 3.5 Cross Product
My notes are available at http://asherbroberts.com/ (so you can write along with me). Elementary Linear Algebra: Applications Version 12th Edition by Howard Anton, Chris Rorres, and Anton Kaul
From playlist Linear Algebra
Part I: Vector Arithmetic, Lec 5 | MIT Calculus Revisited: Multivariable Calculus
Part I: Vector Arithmetic, Lecture 5: The Cross Product Instructor: Herbert Gross View the complete course: http://ocw.mit.edu/RES18-007F11 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT Calculus Revisited: Multivariable Calculus
Calculus 12.4 The Cross Product
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
8ECM Public Lecture: Bojan Mohar
From playlist 8ECM Public Lectures
This video covers all of Chapter 2.4. These videos are associated the textbook by Scott Stevens entitled Matrices, Vectors, & 3D Math; A Game-Programming approach with MATLAB (http://www.StevensMV3D.com).
From playlist Matrices, Vectors, & 3D Math: Lecture Videos
Hank goes over some of the more interesting ways that doctors can use to tell what might be wrong with you. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow References for this episode can be found in the Google document
From playlist Biology