Numerical mathematics of quasicrystals – Pingwen Zhang – ICM2018
Numerical Analysis and Scientific Computing Invited Lecture 15.8 Numerical mathematics of quasicrystals Pingwen Zhang Abstract: Quasicrystals are one kind of fascinating aperiodic structures, and give a strong impact on material science, solid state chemistry, condensed matter physics an
From playlist Numerical Analysis and Scientific Computing
Constructing group actions on quasi-trees – Koji Fujiwara – ICM2018
Topology Invited Lecture 6.12 Constructing group actions on quasi-trees Koji Fujiwara Abstract: A quasi-tree is a geodesic metric space quasi-isometric to a tree. We give a general construction of many actions of groups on quasi-trees. The groups we can handle include non-elementary hype
From playlist Topology
Why Do Physicists Believe In These Particles That DON'T Exist? Quasiparticles by Parth G
The answer: these "Quasiparticles" make physics much easier to study! In this video we'll be studying 3 quasiparticles (sometimes known as collective excitations). They don't actually exist, in that they are not fundamental particles themselves, but can be thought of as mathematical simpl
From playlist Quantum Physics by Parth G
Schemes 27: Quasicoherent sheaves
This lecture is part of an online algebraic geometry course on schemes, based on chapter II of "Algebraic geometry" by Hartshorne. We show how to turn a module over a ring into a sheaf of modules over its spectrum. A quasicoherent sheaf of modules of one which looks locally like one constr
From playlist Algebraic geometry II: Schemes
From playlist the absolute best of stereolab
This is a SOUND PARTICLE - Phonon and Quasiparticle Physics Explained by Parth G
We know that light behaves as a wave AND a particle... but can we treat sound in exactly the same way? And what about this exciting new particle known as the "dance particle"? Hey everyone, in this video I wanted to discuss how physicists like to take complicated physics phenomena and mod
From playlist Classical Physics by Parth G
Schemes 17: Finite, quasifinite
This lecture is part of an online algebraic geometry course on schemes, based on chapter II of "Algebraic geometry" by Hartshorne. We define finite morphisms, and attempt to sort out the three different definition of quasifinite morphisms in the literature.
From playlist Algebraic geometry II: Schemes
Giuseppe Rosolini: Quotient completions and applications
The lecture was held within the framework of the Hausdorff Trimester Program: Types, Sets and Constructions. Abstract: The notion of elementary quotient completion of a Lawvere elementary doctrine introduced by Maietti and Rosolini proved to be a generalization of the notion of the exact
From playlist Workshop: "Proof, Computation, Complexity"
Playing with triangles: a quasi-Pythagorean identity. I highlight a beautiful identity coming from geometry, which has to do with equilateral triangles and complex numbers. This has been inspired by a Tweet by Steven Strogatz from Cornell University. For this, we use Euler's formula and ro
From playlist Complex Analysis