Buy at http://www.shapeways.com/shops/GeometricToy Torus Magic is a transformable torus. This torus object is constructed with many rings,and transforms flat,spherical etc. Also you can turn inside out the torus. Copyright (c) 2014,AkiraNishihara
From playlist 3D printed toys
The torus magic is constructed with many rings. It transforms flat,spherical,etc. Farther more you can turn it inside out.
From playlist Handmade geometric toys
Buy at http://www.shapeways.com/shops/GeometricToy "Torus Magic" can eat another torus.This torus object is constructed with 30 large rings(70mm diameter) and many small rings. Copyright (c) 2015,AkiraNishihara
From playlist 3D printed toys
Buy at http://www.shapeways.com/shops/GeometricToy Torus Magic is a transformable torus. This torus object is constructed with 20 large rings(50mm diameter) and many small rings.It transforms flat,spherical etc. Also you can turn inside out the torus. Copyright (c) 2015,AkiraNishihara
From playlist 3D printed toys
Buy at http://www.shapeways.com/shops/GeometricToy This object consists of two "Torus Magic".These torus objects are constructed with 30 large rings(70mm diameter) and many small rings. Copyright (c) 2015,Akira Nishihara
From playlist 3D printed toys
Buy at http://www.shapeways.com/shops/GeometricToy "Torus Magic" can eat another torus.This torus object is constructed with 30 large rings(70mm diameter) and many small rings. Copyright (c) 2015,AkiraNishihara
From playlist 3D printed toys
Homological algebra 5: Ext(A,B)
This lecture is part of an online course on commutative algebra, following the book "Commutative algebra with a view toward algebraic geometry" by David Eisenbud. We define the groups Ext(A,B) for modules over a ring by analogy with Tor groups. We calculate these for cyclic abelian groups
From playlist Commutative algebra
Homological algebra 2: properties of Tor
This lecture is part of an online course on commutative algebra, following the book "Commutative algebra with a view toward algebraic geometry" by David Eisenbud. We check the basis properties of Tor(A,B) for abelian groups: (1) It is well defined (2) It is a functor (3) It is symmetric:
From playlist Commutative algebra
A (proper) introduction to derived CATegories
While there are introductions to derived categories that are more sensible for practical aspects, in this video I give the audience of taste of what's involved in the proper, formal definition of derived categories. Special thanks to Geoff Vooys, whose notes (below) inspired this video: ht
From playlist Miscellaneous Questions
necklace,two way,Torus by Villarceau circles,mobius ball
From playlist Handmade geometric toys
Francis Brown - 2/4 Mixed Modular Motives and Modular Forms for SL_2 (\Z)
In the `Esquisse d'un programme', Grothendieck proposed studying the action of the absolute Galois group upon the system of profinite fundamental groups of moduli spaces of curves of genus g with n marked points. Around 1990, Ihara, Drinfeld and Deligne independently initiated the study of
From playlist Francis Brown - Mixed Modular Motives and Modular Forms for SL_2 (\Z)
Homological Algebra for Persistence Modules [Nikola Milicevic]
This tutorial is a gentle introduction to homological algebra for persistence modules. Short examples of tensor products and their derived functors are computed. Further examples demonstrate the Kunneth Theorems and Universal Coefficient Theorems for filtered CW complexes. There are few fo
From playlist Tutorial-a-thon 2021 Fall
Peter Bubenik (10/28/20): Homological Algebra for Persistence Modules
Title: Homological Algebra for Persistence Modules Abstract: In linear algebra, we work with vector spaces and linear maps. In persistent homology, we replace a vector space with a sequences of vector spaces and linear maps, called a persistence module. I will give an introduction to the
From playlist AATRN 2020
Homological algebra 3: Tor over rings
This lecture is part of an online course on commutative algebra, following the book "Commutative algebra with a view toward algebraic geometry" by David Eisenbud. We define Tor(A,B) for modules A,B over a ring, and comment that it generalizes homology of groups, homology of Lie algebras,
From playlist Commutative algebra
Physics - Mechanics: Torsion (1 of 14) What is Torsion?
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what is torsion and the variables associated with twisting of a steel rod. Next video in this series can be found at: https://youtu.be/jlt6Jy59nJs
From playlist PHYSICS 16.6 TORSION
Homological algebra 4: Properties of Tor over rings
This lecture is part of an online course on commutative algebra, following the book "Commutative algebra with a view toward algebraic geometry" by David Eisenbud. We check the basic properties of Tor(A,B) over rings: it is well defined, it is symmetric, and there is a long exact sequence
From playlist Commutative algebra
How to use Tor Browser | Tor Tutorial part 1
In this 2020 Tor Browser Tutorial video, you'll learn how to correctly use Tor Browser Bundle to increase your online privacy and anonymity.Support me through Patreon: https://www.patreon.com/thehatedone - or donate anonymously: Monero: 84DYxU8rPzQ88SxQqBF6VBNfPU9c5sjDXfTC1wXkgzWJfVMQ9z
From playlist TUTORIALS & HOW TO's