In algebraic topology, a Postnikov square is a certain cohomology operation from a first cohomology group H1 to a third cohomology group H3, introduced by Postnikov. described a generalization taking classes in Ht to H2t+1. (Wikipedia).
A Rare Look Inside Shanghai Tower
Get a glimpse of the sky gardens, which set Shanghai Tower apart from any high-rise ever built. http://bit.ly/1aNxP18
From playlist Shanghai Tower | The B1M Mail Feature
Tallest Towers in the World Height Comparison 2019 - 3D
Tallest Towers in the World Height Comparison 2019 This is a list of extant towers that fulfill the engineering definition of a tower: "a tall human structure, always taller than it is wide, meant for public or regular operational access by humans, but not for living in or office work, an
From playlist Comparison
Gérard Laumon - On the derived Lusztig correspondence
Correction: The affiliation of Lei Fu is Tsinghua University. https://server.mcm.ac.cn/~zheng/LI/titles.html#Laumon
From playlist Conférence « Géométrie arithmétique en l’honneur de Luc Illusie » - 5 mai 2021
Opening this year, Shanghai Tower is a soaring symbol of China's economic future. The mixed-use tower designed by Gensler will be the tallest building in China--a vertical city defining a new form of urban life. Read more at http://bit.ly/1J3FiVC
From playlist Shanghai Tower | The B1M Mail Feature
From playlist Dimensions Russian / Pусский
Determine if a set of points is a parallelogram using the distance formula
👉 Learn how to determine the figure given four points. A quadrilateral is a polygon with four sides. Some of the types of quadrilaterals are: parallelogram, square, rectangle, rhombus, kite, trapezoid, etc. Each of the types of quadrilateral has its properties. Given four points that repr
From playlist Quadrilaterals on a Coordinate Plane
Using a set of points determine if the figure is a parallelogram using the midpoint formula
👉 Learn how to determine the figure given four points. A quadrilateral is a polygon with four sides. Some of the types of quadrilaterals are: parallelogram, square, rectangle, rhombus, kite, trapezoid, etc. Each of the types of quadrilateral has its properties. Given four points that repr
From playlist Quadrilaterals on a Coordinate Plane
First examples of cluster structures on coordinate algebras, (Lecture 2) by Maitreyee Kulkarni
PROGRAM :SCHOOL ON CLUSTER ALGEBRAS ORGANIZERS :Ashish Gupta and Ashish K Srivastava DATE :08 December 2018 to 22 December 2018 VENUE :Madhava Lecture Hall, ICTS Bangalore In 2000, S. Fomin and A. Zelevinsky introduced Cluster Algebras as abstractions of a combinatoro-algebra
From playlist School on Cluster Algebras 2018
Positive Grassmannian and polyhedral subdivisions – Alexander Postnikov – ICM2018
Combinatorics Invited Lecture 13.2 Positive Grassmannian and polyhedral subdivisions Alexander Postnikov Abstract: The nonnegative Grassmannian is a cell complex with rich geometric, algebraic, and combinatorial structures. Its study involves interesting combinatorial objects, such as po
From playlist Combinatorics
Lauren Williams - Combinatorics of the amplituhedron
The amplituhedron is the image of the positive Grassmannian under a map in- duced by a totally positive matrix. It was introduced by Arkani-Hamed and Trnka to compute scattering amplitudes in N=4 super Yang Mills. I’ll give a gentle introduction to the amplituhedron, surveying its connecti
From playlist Combinatorics and Arithmetic for Physics: Special Days 2022
Courtney Thatcher - Classifying $(Z/p)^2$ actions on products of spheres
38th Annual Geometric Topology Workshop (Online), June 15-17, 2021 Courtney Thatcher, University of Puget Sound Title: Classifying $(Z/p)^2$ actions on products of spheres Abstract: We consider free actions of $(Z/p)^2$ on $S^{2n-1}\times S^{2n-1}$ given by linear actions of $(Z/p)^2$ on
From playlist 38th Annual Geometric Topology Workshop (Online), June 15-17, 2021
Determine if a set of points is a parallelogram by using the slope formula
👉 Learn how to determine the figure given four points. A quadrilateral is a polygon with four sides. Some of the types of quadrilaterals are: parallelogram, square, rectangle, rhombus, kite, trapezoid, etc. Each of the types of quadrilateral has its properties. Given four points that repr
From playlist Quadrilaterals on a Coordinate Plane
Why The Soviet Union Flooded This Belltower
Since 1939, a flooded bell tower near the small Russian town of Kalyazin has played the role of the nautical marker, an artificial island in an artificial lake, swim area, and tourist draw. While still, a solid structure visited by tourists and occasionally hosts Orthodox Christian ceremon
From playlist IT'S HISTORY Feature Videos
First examples of cluster structures on coordinate algebras,... (Lecture 1) by Maitreyee Kulkarni
PROGRAM :SCHOOL ON CLUSTER ALGEBRAS ORGANIZERS :Ashish Gupta and Ashish K Srivastava DATE :08 December 2018 to 22 December 2018 VENUE :Madhava Lecture Hall, ICTS Bangalore In 2000, S. Fomin and A. Zelevinsky introduced Cluster Algebras as abstractions of a combinatoro-algebra
From playlist School on Cluster Algebras 2018
Gravitational Waves and Theory - L. Blanchet - Workshop 1 - CEB T3 2018
Luc Blanchet (IAP, Paris) / 19.09.2018 Gravitational Waves and Theory ---------------------------------- Vous pouvez nous rejoindre sur les réseaux sociaux pour suivre nos actualités. Facebook : https://www.facebook.com/InstitutHenriPoincare/ Twitter : https://twitter.com/InHenriPoincar
From playlist 2018 - T3 - Analytics, Inference, and Computation in Cosmology
Arun Debray - Stable diffeomorphism classification of some unorientable 4-manifolds
38th Annual Geometric Topology Workshop (Online), June 15-17, 2021 Arun Debray, The University of Texas at Austin Title: Stable diffeomorphism classification of some unorientable 4-manifolds Abstract: Kreck's modified surgery theory provides a bordism-theoretic classification of closed, c
From playlist 38th Annual Geometric Topology Workshop (Online), June 15-17, 2021
The Inverse of a Square Matrix
Watch more videos on http://www.brightstorm.com/math/precalculus SUBSCRIBE FOR All OUR VIDEOS! https://www.youtube.com/subscription_center?add_user=brightstorm2 VISIT BRIGHTSTORM.com FOR TONS OF VIDEO TUTORIALS AND OTHER FEATURES! http://www.brightstorm.com/ LET'S CONNECT! Facebook ► ht
From playlist Precalculus
Probability Seminar Topic: Dimers and 3-Webs Speaker: Richard Kenyon Affiliation: Yale University Date: October 26, 2022 11:15am West Lecture Hall This is joint work with Haolin Shi (Yale). 3-webs are bipartite, trivalent, planar graphs. They were defined and studied by Kuperberg who sho
From playlist Mathematics
First examples of cluster structures on coordinate algebras... (Lecture 3) by Maitreyee Kulkarni
PROGRAM :SCHOOL ON CLUSTER ALGEBRAS ORGANIZERS :Ashish Gupta and Ashish K Srivastava DATE :08 December 2018 to 22 December 2018 VENUE :Madhava Lecture Hall, ICTS Bangalore In 2000, S. Fomin and A. Zelevinsky introduced Cluster Algebras as abstractions of a combinatoro-algebra
From playlist School on Cluster Algebras 2018
How to determine the perimeter of a quadrilateral using distance formula of four points
👉 Learn how to determine the figure given four points. A quadrilateral is a polygon with four sides. Some of the types of quadrilaterals are: parallelogram, square, rectangle, rhombus, kite, trapezoid, etc. Each of the types of quadrilateral has its properties. Given four points that repr
From playlist Quadrilaterals on a Coordinate Plane