In algebraic geometry, the Behrend function of a scheme X, introduced by Kai Behrend, is a such that if X is a quasi-projective proper moduli scheme carrying a symmetric obstruction theory, then the weighted Euler characteristic is the degree of the virtual fundamental class of X, which is an element of the zeroth Chow group of X. Modulo some solvable technical difficulties (e.g., what is the Chow group of a stack?), the definition extends to moduli stacks such as the moduli stack of stable sheaves (the Donaldson–Thomas theory) or that of stable maps (the Gromov–Witten theory). (Wikipedia).
Definition of a Surjective Function and a Function that is NOT Surjective
We define what it means for a function to be surjective and explain the intuition behind the definition. We then do an example where we show a function is not surjective. Surjective functions are also called onto functions. Useful Math Supplies https://amzn.to/3Y5TGcv My Recording Gear ht
From playlist Injective, Surjective, and Bijective Functions
Definition of an Injective Function and Sample Proof
We define what it means for a function to be injective and do a simple proof where we show a specific function is injective. Injective functions are also called one-to-one functions. Useful Math Supplies https://amzn.to/3Y5TGcv My Recording Gear https://amzn.to/3BFvcxp (these are my affil
From playlist Injective, Surjective, and Bijective Functions
[c][explained] Demystifying Pointers — Function Pointers
Find the complete program on https://www.notion.so/theteachr/Function-Pointers-9848de630cae47a7ad1ca5552d23a66d.
From playlist Demystifying Pointers
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
Function (Understand What This Means In Algebra)
A function is an extremely important concept in algebra. Basically a function is a type of relation. In this video a function and relation will be defined. Also, the terms domain and range will be explained as well. For more math help please visit http://tabletclass.com
From playlist GED Prep Videos
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
Comparing Iterative and Recursive Factorial Functions
Comparing iterative and recursive factorial functions
From playlist Computer Science
What is a Function? Basic Introduction for Algebra Students
TabletClass Math: https://tcmathacademy.com/ Introductory algebra - an introduction to functions to include domain and range. For more math help to include math lessons, practice problems and math tutorials check out my full math help program at https://tcmathacademy.com/ Math No
From playlist GED Prep Videos
What are bounded functions and how do you determine the boundness
👉 Learn about the characteristics of a function. Given a function, we can determine the characteristics of the function's graph. We can determine the end behavior of the graph of the function (rises or falls left and rises or falls right). We can determine the number of zeros of the functi
From playlist Characteristics of Functions
IR3.6 Inverse document frequency (idf)
From playlist IR3 Vector Space Model
Abstract Algebra | Injective Functions
We give the definition of an injective function, an outline of proving that a given function is injective, and a few examples. http://www.michael-penn.net http://www.randolphcollege.edu/mathematics/
From playlist Abstract Algebra
The Green - Tao Theorem (Lecture 1) by D. S. Ramana
Program Workshop on Additive Combinatorics ORGANIZERS: S. D. Adhikari and D. S. Ramana DATE: 24 February 2020 to 06 March 2020 VENUE: Madhava Lecture Hall, ICTS Bangalore Additive combinatorics is an active branch of mathematics that interfaces with combinatorics, number theory, ergod
From playlist Workshop on Additive Combinatorics 2020
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
Define linear functions. Use function notation to evaluate linear functions. Learn to identify linear function from data, graphs, and equations.
From playlist Algebra 1
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"
Strong Bounds for 3-Progressions: In-Depth - Zander Kelley
Computer Science/Discrete Mathematics Seminar II Topic: Strong Bounds for 3-Progressions: In-Depth Speaker: Zander Kelley Affiliation: University of Illinois Urbana-Champaign Date: March 21, 2023 Suppose you have a set S of integers from {1 , 2 , … , N} that contains at least N / C eleme
From playlist Mathematics
You can create your own mix on https://www.mixthecity.com Directed and Shot by Kutiman Assistant Director & Additional Footage by Ariel Tagar Executive Producer: Michael Lehmann Creative Producer: Gudrun Lehmann Junior Producer: Anna Janikow Line Producer: Andreas Knoblauch Production Ma
From playlist World
Bourbaki - 16/01/2016 - 2/4 - Betrand Toën
Bertrand TOËN — Problèmes de modules formels [d'après V. Drinfeld, V. Hinich, M. Kontsevich, J. Lurie...] [PDF] [YouTube] Le thème principal de cet exposé est la théorie des déformations (formelles), dont l’objet est l’étude des familles algébriques de structures variées et paramétrées par
From playlist Bourbaki - 16 janvier 2016
What is a Function? Calculus for Beginners: Dr Chris Tisdell Live Stream
What is a function and how are they useful? This video will answer these questions from an elementary mathematics point of view. Functions are a bit like a machine that follows a processing rule. You input something (like a number), the machine processes the number according to the rule,
From playlist Calculus for Beginners
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