Theorems in algebraic geometry
In algebraic geometry, Behrend's trace formula is a generalization of the Grothendieck–Lefschetz trace formula to a smooth algebraic stack over a finite field, conjectured in 1993 and proven in 2003 by Kai Behrend. Unlike the classical one, the formula counts points in the "stacky way"; it takes into account the presence of nontrivial automorphisms. The desire for the formula comes from the fact that it applies to the moduli stack of principal bundles on a curve over a finite field (in some instances indirectly, via the Harder–Narasimhan stratification, as the moduli stack is not of finite type.) See the moduli stack of principal bundles and references therein for the precise formulation in this case. Pierre Deligne found an example that shows the formula may be interpreted as a sort of the Selberg trace formula. A proof of the formula in the context of the six operations formalism developed by Yves Laszlo and Martin Olsson is given by Shenghao Sun. (Wikipedia).
Chemistry - Atoms, Molecules, and Ions (8 of 23) Determining the Emperical Formula
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain and shows how to determine the empirical formula.
From playlist Michel van Biezen: CHEM - Introduction
Empirical and Molecular Formulas from Mass Composition (No. 2)
Shows how to determine the empirical and molecular formulas for a compound if you are given the mass of each element in the compound and the molecular weight. You can see a listing of all my videos at my website, http://www.stepbystepscience.com
From playlist Chemical Equations; Ionic and Covalent Compounds
Marc Levine: Refined enumerative geometry (Lecture 3)
The lecture was held within the framework of the Hausdorff Trimester Program: K-Theory and Related Fields. Lecture 3: Virtual fundamental classes in motivic homotopy theory Using the formalism of algebraic stacks, Behrend-Fantechi define the intrinsic normal cone, its fundamental class in
From playlist HIM Lectures: Trimester Program "K-Theory and Related Fields"
Molecular Formula | Chemistry | Homework Help
The Molecular Formula tells you the number of atoms of each of the elements in one molecule of a compound. In a previous video, we found the Empirical Formula, and this is a related idea, but not the same thing. The Empirical Formula gives the lowest whole number ratio of the atoms of the
From playlist Chemistry Lessons
Theory of numbers: Gauss's lemma
This lecture is part of an online undergraduate course on the theory of numbers. We describe Gauss's lemma which gives a useful criterion for whether a number n is a quadratic residue of a prime p. We work it out explicitly for n = -1, 2 and 3, and as an application prove some cases of Di
From playlist Theory of numbers
Marc Levine: Refined enumerative geometry (Lecture 1)
The lecture was held within the framework of the Hausdorff Trimester Program: K-Theory and Related Fields. Marc Levine: Refined enumerative geometry Abstract: Lecture 1: Milnor-Witt sheaves, motivic homotopy theory and Chow-Witt groups We review the Hoplins-Morel construction of the Miln
From playlist HIM Lectures: Trimester Program "K-Theory and Related Fields"
Rahul Pandharipande - Enumerative Geometry of Curves, Maps, and Sheaves 3/5
The main topics will be the intersection theory of tautological classes on moduli space of curves, the enumeration of stable maps via Gromov-Witten theory, and the enumeration of sheaves via Donaldson-Thomas theory. I will cover a mix of classical and modern results. My goal will be, by th
From playlist 2021 IHES Summer School - Enumerative Geometry, Physics and Representation Theory
Chemistry - Atoms, Molecules, and Ions (7 of 23) Empirical Formula
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the empirical formula and shows the simplest ratio of atom present.
From playlist Michel van Biezen: CHEM - Introduction
Describe and solve for the zeros using quadratic formula
👉 Learn how to solve quadratic equations using the quadratic formula. A quadratic equation is an equation whose highest power on its variable(s) is 2. The quadratic formula is a formula which can be used to find the roots of (solve) a quadratic equation. The quadratic formula is given by
From playlist Solve by Quadratic Formula | x^2+bx+c
Secret of row 10: a new visual key to ancient Pascalian puzzles
NEW (Christmas 2019). Two ways to support Mathologer Mathologer Patreon: https://www.patreon.com/mathologer Mathologer PayPal: paypal.me/mathologer (see the Patreon page for details) Today's video is about a recent chance discovery (2002) that provides a new beautiful visual key to some
From playlist Recent videos
Tropical motivic integration - S. Payne - Workshop 2 - CEB T1 2018
Sam Payne (Yale University) / 09.03.2018 Tropical motivic integration. I will present a new tool for the calculation of motivic invariants appearing in Donaldson-Thomas theory, such as the motivic Milnor fiber and motivic nearby fiber, starting from a theory of volumes of semi-algebraic
From playlist 2018 - T1 - Model Theory, Combinatorics and Valued fields
DT curve counting for CY3's and birational transformations - John Calabrese
Workshop on Homological Mirror Symmetry: Methods and Structures Speaker:John Calabrese Title: DT curve counting for CY3's and birational transformations Affiliation: Rice University Date: November 8, 2016 For more video, visit http://video.ias.edu
From playlist Mathematics
IR3.6 Inverse document frequency (idf)
From playlist IR3 Vector Space Model
Finding and Calculating an Empirical Formula of a Compound | How to Pass Chemistry
This video goes into detailed steps on how to find the empirical formula of a compound. Hooray for no more confusion! Check out my NEW complete guide on Empirical Formulas, Molecular Formulas, Combustion Analysis and more! Get the guide here: https://melissa.help/matterguide 📗 FREE CHEMI
From playlist How to Pass Chemistry
The discriminant and finding the solutions using quadratic formula
👉 Learn how to solve quadratic equations using the quadratic formula. A quadratic equation is an equation whose highest power on its variable(s) is 2. The quadratic formula is a formula which can be used to find the roots of (solve) a quadratic equation. The quadratic formula is given by
From playlist Solve by Quadratic Formula | x^2+bx+c
Gromov–Witten Invariants and the Virasoro Conjecture - II (Remote Talk) by Ezra Getzler
J-Holomorphic Curves and Gromov-Witten Invariants DATE:25 December 2017 to 04 January 2018 VENUE:Madhava Lecture Hall, ICTS, Bangalore Holomorphic curves are a central object of study in complex algebraic geometry. Such curves are meaningful even when the target has an almost complex stru
From playlist J-Holomorphic Curves and Gromov-Witten Invariants
Find the roots of a quadratic using the quadratic formula
👉 Learn how to solve quadratic equations using the quadratic formula. A quadratic equation is an equation whose highest power on its variable(s) is 2. The quadratic formula is a formula which can be used to find the roots of (solve) a quadratic equation. The quadratic formula is given by
From playlist Solve by Quadratic Formula | x^2+bx+c
Rahul Pandharipande - Enumerative Geometry of Curves, Maps, and Sheaves 2/5
The main topics will be the intersection theory of tautological classes on moduli space of curves, the enumeration of stable maps via Gromov-Witten theory, and the enumeration of sheaves via Donaldson-Thomas theory. I will cover a mix of classical and modern results. My goal will be, by th
From playlist 2021 IHES Summer School - Enumerative Geometry, Physics and Representation Theory
Strong Bounds for 3-Progressions - Raghu Meka
Computer Science/Discrete Mathematics Seminar I Topic: Strong Bounds for 3-Progressions Speaker: Raghu Meka Affiliation: University of California, Los Angeles; University of Illinois Urbana-Champaign Date: March 20, 2023 Suppose you have a set S of integers from {1 , 2 , … , N} that con
From playlist Mathematics
How is the quadratic formula derived
👉 Learn all about the quadratic formula. The quadratic formula is a formula which can be used to find the roots of (solve) a quadratic equation. The quadratic formula is given by x = (-b +/- sqrt(b^2 - 4ac)) / 2a, where a is the coefficient of the quadratic term (x^2), b is the coefficient
From playlist Solve by Quadratic Formula | Learn About