Equivalence (mathematics) | Linear algebra | Matrices

Matrix congruence

In mathematics, two square matrices A and B over a field are called congruent if there exists an invertible matrix P over the same field such that PTAP = B where "T" denotes the matrix transpose. Matrix congruence is an equivalence relation. Matrix congruence arises when considering the effect of change of basis on the Gram matrix attached to a bilinear form or quadratic form on a finite-dimensional vector space: two matrices are congruent if and only if they represent the same bilinear form with respect to different bases. Note that Halmos defines congruence in terms of conjugate transpose (with respect to a complex inner product space) rather than transpose, but this definition has not been adopted by most other authors. (Wikipedia).

Video thumbnail

Linear congruences

In this video we continue discussing congruences and, in particular, we discuss solutions of linear congruences. The content of this video corresponds to Section 4.4 of my book "Number Theory and Geometry" which you can find here: https://alozano.clas.uconn.edu/number-theory-and-geometry/

From playlist Number Theory and Geometry

Video thumbnail

Triangle Congruence (quick review)

More resources available at www.misterwootube.com

From playlist Further Properties of Geometrical Figures

Video thumbnail

Number Theory | Congruence Modulo n -- Definition and Examples

We define the notion of congruence modulo n among the integers. http://www.michael-penn.net

From playlist Modular Arithmetic and Linear Congruences

Video thumbnail

2.2.1 Congruence mod n: Video

MIT 6.042J Mathematics for Computer Science, Spring 2015 View the complete course: http://ocw.mit.edu/6-042JS15 Instructor: Albert R. Meyer License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu

From playlist MIT 6.042J Mathematics for Computer Science, Spring 2015

Video thumbnail

Number Theory | Some properties of integer congruence.

We examine some basic properties of congruence modulo n among the integers.

From playlist Modular Arithmetic and Linear Congruences

Video thumbnail

Congruence Modulo n Arithmetic Properties: Equivalent Relation

This video explains the properties of congruence modulo which makes it an equivalent relation. mathispower4u.com

From playlist Additional Topics: Generating Functions and Intro to Number Theory (Discrete Math)

Video thumbnail

Groups with bounded generation: old and new - Andrei S. Rapinchuk

Joint IAS/Princeton University Number Theory Seminar Topic: Groups with bounded generation: old and new Speaker: Andrei S. Rapinchuk Date: May 06, 2021 For more video please visit http://video.ias.edu

From playlist Mathematics

Video thumbnail

Geodesic Random Line Processes and the Roots of Quadratic Congruences by Jens Marklof

PROGRAM : ERGODIC THEORY AND DYNAMICAL SYSTEMS (HYBRID) ORGANIZERS : C. S. Aravinda (TIFR-CAM, Bengaluru), Anish Ghosh (TIFR, Mumbai) and Riddhi Shah (JNU, New Delhi) DATE : 05 December 2022 to 16 December 2022 VENUE : Ramanujan Lecture Hall and Online The programme will have an emphasis

From playlist Ergodic Theory and Dynamical Systems 2022

Video thumbnail

Commutative algebra 12: Examples of Spec R

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 give some examples of the spectrum of a ring, including the rings of Gaussian integers, polynomials and power series in 2 v

From playlist Commutative algebra

Video thumbnail

The congruence subgroup property for SL(2,Z) - William Yun Chen

Arithmetic Groups Topic: The congruence subgroup property for SL(2,Z) Speaker: William Yun Chen Affiliation: Member, School of Mathematics Date: November 10, 2021 Somehow, despite the title, SL(2,Z) is the poster child for arithmetic groups not satisfying the congruence subgroup property

From playlist Mathematics

Video thumbnail

Angelica Babei - A family of $\phi$-congruence subgroups of the modular group

In this talk, we introduce families of subgroups of finite index in the modular group, generalizing the congruence subgroups. One source of such families is studying homomorphisms of the modular group into linear algebraic groups over finite fields. In particular, we examine a family of no

From playlist École d'Été 2022 - Cohomology Geometry and Explicit Number Theory

Video thumbnail

Quadratic Forms -- Number Theory 27

Suggest a problem: https://forms.gle/ea7Pw7HcKePGB4my5 Please Subscribe: https://www.youtube.com/michaelpennmath?sub_confirmation=1 Patreon: https://www.patreon.com/michaelpennmath Merch: https://teespring.com/stores/michael-penn-math Personal Website: http://www.michael-penn.net Randolp

From playlist Number Theory v2

Video thumbnail

Quadratic Forms -- Number Theory 27

⭐Support the channel⭐ Patreon: https://www.patreon.com/michaelpennmath Merch: https://teespring.com/stores/michael-penn-math My amazon shop: https://www.amazon.com/shop/michaelpenn 🟢 Discord: https://discord.gg/Ta6PTGtKBm ⭐my other channels⭐ Main Channel: https://www.youtube.

From playlist Number Theory

Video thumbnail

Commutators in SL_2 and Markoff Surfaces - Peter Sarnak

We discuss a local to global profinite principle for being a commutator in some arithmetic groups. Specifically we show that SL2(Z) satisfies such a principle, while it can fail with infinitely many exceptions for SL2(Z[1/p]). The source of the failure is a reciprocity obstruction to the i

From playlist Mathematics

Video thumbnail

Introduction to Congruent Triangles

Complete videos list: http://mathispower4u.yolasite.com/ This video will define congruent triangles and state the ways to prove two triangles are congruent.

From playlist Triangles and Congruence

Video thumbnail

Applications of the Relative Trace Formula - Valentin Blomer

Joint IAS/PU Number Theory Seminar Topic: Applications of the Relative Trace Formula Speaker: Valentin Blomer Affiliation: Universität Bonn Date: February 23, 2023 I discuss the spectral and arithmetic side of the relative trace formula of Kuznetsov type for congruence subgroups of SL(n

From playlist Mathematics

Video thumbnail

What is the Definition of Congruent Triangles - Congruent Triangles

👉 Learn about congruent triangles theorems. Two or more triangles (or polygons) are said to be congruent if they have the same shape and size. There are many methods to determine whether two triangles are congruent. Some of the methods include: (1) The SSS (Side Side Side) congruency the

From playlist Congruent Triangles

Related pages

Vector space | Sylvester's law of inertia | Congruence relation | Conjugate transpose | Matrix similarity | Dimension (vector space) | Paul Halmos | Mathematics | Change of basis | Field (mathematics) | Square matrix | Real number | Symmetric matrix | Basis (linear algebra) | Bilinear form | Equivalence relation | Quadratic form | Matrix equivalence | Complex number | Inner product space | Gram matrix | Invertible matrix