This document discusses eigenvalues and diagonalization of matrices. Some key points:
- Eigenvalues are values that satisfy the equation AX = λX, where X is a non-zero eigenvector. The eigenspace associated with λ contains all eigenvectors for that eigenvalue.
- The characteristic polynomial of a matrix A is defined as det(xI - A). The eigenvalues of A are the roots of its characteristic polynomial.
- Similar matrices have the same eigenvalues, determinant, rank, trace, and characteristic polynomial. Two matrices are similar if one can be obtained from the other by conjugation via an invertible matrix.
- The trace of a matrix is the sum of its diagonal entries
4. Linear Algebra for Machine Learning: Eigenvalues, Eigenvectors and Diagona...Ceni Babaoglu, PhD
The seminar series will focus on the mathematical background needed for machine learning. The first set of the seminars will be on "Linear Algebra for Machine Learning". Here are the slides of the fourth part which is discussing eigenvalues, eigenvectors and diagonalization.
Here is the link of the first part which was discussing linear systems: https://www.slideshare.net/CeniBabaogluPhDinMat/linear-algebra-for-machine-learning-linear-systems/1
Here are the slides of the second part which was discussing basis and dimension:
https://www.slideshare.net/CeniBabaogluPhDinMat/2-linear-algebra-for-machine-learning-basis-and-dimension
Here are the slides of the third part which is discussing factorization and linear transformations.
https://www.slideshare.net/CeniBabaogluPhDinMat/3-linear-algebra-for-machine-learning-factorization-and-linear-transformations-130813437
5. Linear Algebra for Machine Learning: Singular Value Decomposition and Prin...Ceni Babaoglu, PhD
The seminar series will focus on the mathematical background needed for machine learning. The first set of the seminars will be on "Linear Algebra for Machine Learning". Here are the slides of the fifth part which is discussing singular value decomposition and principal component analysis.
Here are the slides of the first part which was discussing linear systems: https://www.slideshare.net/CeniBabaogluPhDinMat/linear-algebra-for-machine-learning-linear-systems/1
Here are the slides of the second part which was discussing basis and dimension:
https://www.slideshare.net/CeniBabaogluPhDinMat/2-linear-algebra-for-machine-learning-basis-and-dimension
Here are the slides of the third part which is discussing factorization and linear transformations.
https://www.slideshare.net/CeniBabaogluPhDinMat/3-linear-algebra-for-machine-learning-factorization-and-linear-transformations-130813437
Here are the slides of the fourth part which is discussing eigenvalues and eigenvectors.
https://www.slideshare.net/CeniBabaogluPhDinMat/4-linear-algebra-for-machine-learning-eigenvalues-eigenvectors-and-diagonalization
1. Linear Algebra for Machine Learning: Linear SystemsCeni Babaoglu, PhD
The seminar series will focus on the mathematical background needed for machine learning. The first set of the seminars will be on "Linear Algebra for Machine Learning". Here are the slides of the first part which is giving a short overview of matrices and discussing linear systems.
Eigen values and eigen vectors engineeringshubham211
mathematics...for engineering mathematics.....learn maths...............................The individual items in a matrix are called its elements or entries.[4] Provided that they are the same size (have the same number of rows and the same number of columns), two matrices can be added or subtracted element by element. The rule for matrix multiplication, however, is that two matrices can be multiplied only when the number of columns in the first equals the number of rows in the second. Any matrix can be multiplied element-wise by a scalar from its associated field. A major application of matrices is to represent linear transformations, that is, generalizations of linear functions such as f(x) = 4x. For example, the rotation of vectors in three dimensional space is a linear transformation which can be represented by a rotation matrix R: if v is a column vector (a matrix with only one column) describing the position of a point in space, the product Rv is a column vector describing the position of that point after a rotation. The product of two transformation matrices is a matrix that represents the composition of two linear transformations. Another application of matrices is in the solution of systems of linear equations. If the matrix is square, it is possible to deduce some of its properties by computing its determinant. For example, a square matrix has an inverse if and only if its determinant is not zero. Insight into the geometry of a linear transformation is obtainable (along with other information) from the matrix's eigenvalues and eigenvectors.
Applications of matrices are found in most scientific fields. In every branch of physics, including classical mechanics, optics, electromagnetism, quantum mechanics, and quantum electrodynamics, they are used to study physical phenomena, such as the motion of rigid bodies. In computer graphics, they are used to project a 3-dimensional image onto a 2-dimensional screen. In probability theory and statistics, stochastic matrices are used to describe sets of probabilities; for instance, they are used within the PageRank algorithm that ranks the pages in a Google search.[5] Matrix calculus generalizes classical analytical notions such as derivatives and exponentials to higher dimensions.
A major branch of numerical analysis is devoted to the development of efficient algorithms for matrix computations, a subject that is centuries old and is today an expanding area of research. Matrix decomposition methods simplify computations, both theoretically and practically. Algorithms that are tailored to particular matrix structures, such as sparse matrices and near-diagonal matrices, expedite computations in finite element method and other computations. Infinite matrices occur in planetary theory and in atomic theory. A simple example of an infinite matrix is the matrix representing the derivative operator, which acts on the Taylor series of a function
...
2. Linear Algebra for Machine Learning: Basis and DimensionCeni Babaoglu, PhD
The seminar series will focus on the mathematical background needed for machine learning. The first set of the seminars will be on "Linear Algebra for Machine Learning". Here are the slides of the second part which is discussing basis and dimension.
Here is the link of the first part which was discussing linear systems: https://www.slideshare.net/CeniBabaogluPhDinMat/linear-algebra-for-machine-learning-linear-systems/1
4. Linear Algebra for Machine Learning: Eigenvalues, Eigenvectors and Diagona...Ceni Babaoglu, PhD
The seminar series will focus on the mathematical background needed for machine learning. The first set of the seminars will be on "Linear Algebra for Machine Learning". Here are the slides of the fourth part which is discussing eigenvalues, eigenvectors and diagonalization.
Here is the link of the first part which was discussing linear systems: https://www.slideshare.net/CeniBabaogluPhDinMat/linear-algebra-for-machine-learning-linear-systems/1
Here are the slides of the second part which was discussing basis and dimension:
https://www.slideshare.net/CeniBabaogluPhDinMat/2-linear-algebra-for-machine-learning-basis-and-dimension
Here are the slides of the third part which is discussing factorization and linear transformations.
https://www.slideshare.net/CeniBabaogluPhDinMat/3-linear-algebra-for-machine-learning-factorization-and-linear-transformations-130813437
5. Linear Algebra for Machine Learning: Singular Value Decomposition and Prin...Ceni Babaoglu, PhD
The seminar series will focus on the mathematical background needed for machine learning. The first set of the seminars will be on "Linear Algebra for Machine Learning". Here are the slides of the fifth part which is discussing singular value decomposition and principal component analysis.
Here are the slides of the first part which was discussing linear systems: https://www.slideshare.net/CeniBabaogluPhDinMat/linear-algebra-for-machine-learning-linear-systems/1
Here are the slides of the second part which was discussing basis and dimension:
https://www.slideshare.net/CeniBabaogluPhDinMat/2-linear-algebra-for-machine-learning-basis-and-dimension
Here are the slides of the third part which is discussing factorization and linear transformations.
https://www.slideshare.net/CeniBabaogluPhDinMat/3-linear-algebra-for-machine-learning-factorization-and-linear-transformations-130813437
Here are the slides of the fourth part which is discussing eigenvalues and eigenvectors.
https://www.slideshare.net/CeniBabaogluPhDinMat/4-linear-algebra-for-machine-learning-eigenvalues-eigenvectors-and-diagonalization
1. Linear Algebra for Machine Learning: Linear SystemsCeni Babaoglu, PhD
The seminar series will focus on the mathematical background needed for machine learning. The first set of the seminars will be on "Linear Algebra for Machine Learning". Here are the slides of the first part which is giving a short overview of matrices and discussing linear systems.
Eigen values and eigen vectors engineeringshubham211
mathematics...for engineering mathematics.....learn maths...............................The individual items in a matrix are called its elements or entries.[4] Provided that they are the same size (have the same number of rows and the same number of columns), two matrices can be added or subtracted element by element. The rule for matrix multiplication, however, is that two matrices can be multiplied only when the number of columns in the first equals the number of rows in the second. Any matrix can be multiplied element-wise by a scalar from its associated field. A major application of matrices is to represent linear transformations, that is, generalizations of linear functions such as f(x) = 4x. For example, the rotation of vectors in three dimensional space is a linear transformation which can be represented by a rotation matrix R: if v is a column vector (a matrix with only one column) describing the position of a point in space, the product Rv is a column vector describing the position of that point after a rotation. The product of two transformation matrices is a matrix that represents the composition of two linear transformations. Another application of matrices is in the solution of systems of linear equations. If the matrix is square, it is possible to deduce some of its properties by computing its determinant. For example, a square matrix has an inverse if and only if its determinant is not zero. Insight into the geometry of a linear transformation is obtainable (along with other information) from the matrix's eigenvalues and eigenvectors.
Applications of matrices are found in most scientific fields. In every branch of physics, including classical mechanics, optics, electromagnetism, quantum mechanics, and quantum electrodynamics, they are used to study physical phenomena, such as the motion of rigid bodies. In computer graphics, they are used to project a 3-dimensional image onto a 2-dimensional screen. In probability theory and statistics, stochastic matrices are used to describe sets of probabilities; for instance, they are used within the PageRank algorithm that ranks the pages in a Google search.[5] Matrix calculus generalizes classical analytical notions such as derivatives and exponentials to higher dimensions.
A major branch of numerical analysis is devoted to the development of efficient algorithms for matrix computations, a subject that is centuries old and is today an expanding area of research. Matrix decomposition methods simplify computations, both theoretically and practically. Algorithms that are tailored to particular matrix structures, such as sparse matrices and near-diagonal matrices, expedite computations in finite element method and other computations. Infinite matrices occur in planetary theory and in atomic theory. A simple example of an infinite matrix is the matrix representing the derivative operator, which acts on the Taylor series of a function
...
2. Linear Algebra for Machine Learning: Basis and DimensionCeni Babaoglu, PhD
The seminar series will focus on the mathematical background needed for machine learning. The first set of the seminars will be on "Linear Algebra for Machine Learning". Here are the slides of the second part which is discussing basis and dimension.
Here is the link of the first part which was discussing linear systems: https://www.slideshare.net/CeniBabaogluPhDinMat/linear-algebra-for-machine-learning-linear-systems/1
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This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
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The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
2. Definitions
A is n x n. λ is an eigenvalue of A if
AX = λX has non zero solutions X (called eigenvectors)
If λ is an eigenvalue of A, the set
Eλ = Eλ(A) = {X | X in ℜn
, AX = λX}
is a vector space called the eigenspace associated w/ λ
(i.e. Eλ is all eigenvectors corresponding to λ & 0 vector)
λ is eigenvalue if Eλ has at least one non-zero vector.
Can also write AX = λX as (λIn - A)X = 0
3. Example
Show that λ = -3 is an eigenvalue of A, and find the
eigenspace E-3.
A =
5 8 16
4 1 8
−4 −4 −11
Write out (λIn - A)X = 0 and solve.
Get:
X = s
−1
1
0
+ t
−2
0
1
So it is an eigenvalue since there is a
non-zero solution. Eigenspace is:
E−3 = span
−1
1
0
,
−2
0
1
4. Discussion
Now we have (λIn - A)X = 0, and λ is an eigenvalue iff there
exists a nonzero solution X.
Recall that a matrix U is invertible iff UX = 0 implies X = 0.
So, since we are looking for a nonzero solution above,
(λIn-A) cannot be invertible for λ to be an eigenvalue.
So det (λIn-A) =0.
6. Theorem 1
A (n x n). The eigenvalues of A are the real roots of the
characteristic polynomial of A --the real numbers λ satisfying:
cA(λ) = det(λIn - A) = 0
The eigenspace Eλ = {X | (λI - A)X = 0}
consists of all solutions to a system of n linear equations in n
variables.
The eigenvectors corresponding to λ are the nonzero vectors
in the eigenspace.
7. Summary
So there are two issues: finding eigenvalues, and finding
eigenspaces (and eigenvectors).
Finding the eigenvalues can be difficult - won’t do much here.
Spend more time dealing with eigenspaces.
8. Example
Find the characteristic polynomial, eigenvalues, and
eigenspaces of A:
A =
1 −2 3
2 6 −6
1 2 −1
Set up cA(x) = det (xI - A)
Eigenvalues will be the roots of the polynomial as those will
give us where det is 0.
Then use those λ to find eigenspace: X such that (λ I-A)X=0
9. Example
If A is a triangular matrix, show that the eigenvalues of A are
the entries on the main diagonal.
Proof: cA(x) = det (xI - A) = det ( a triangular matrix) =
product of entries on main diagonal of (xI - A).
The matrix showing entries on main diagonal is:
x − a11
x − a22
...
x − ann
det = (x-a11)(x-a22)…(x-ann)
So eigenvalues are{a11,a22,…,ann}
10. Example
Show that A and AT
have the same characteristic polynomial
and thus the same eigenvalues.
Proof: From chapter 3, we know that a matrix and its
transpose will have the same determinant.
cA
T (x) = det(xI − AT
) = det((xI)T
− A)T
= det(xI − A)T
= det(xI − A) = cA
(x)
11. Theorem 2
If A is a real symmetric matrix, each root of the characteristic
polynomial cA(x) is real. (to be proven later)
Show this is true for a (2 x 2):
A =
a b
b c
cA (x) = det
x − a −b
−b x − c
= (x − a)(x − c) − b
2
= x2
− x(a + c) + (ac − b2
)
Recall that we can determine the nature of the roots from the
discriminant: (b2
-4ac) = (a+c)2
-4(ac+b2
) = a2
+c2
+2ac-4ac+4b2
=a2
-2ac+c2
+4b2
= (a-c)2
+ 4b2
which is always pos so real roots.
12. Similar Matrices
A, B (n x n) are similar (we say A~B) if B = P-1
AP
holds for some invertible matrix.
P is not unique.
13. Example
Find P-1
AP in the following case, then compute An
.
P =
1 5
1 2
, A =
6 −5
2 −1
We are able to find a similar matrix B.
Then P-1
AP=B.
So A = PBP-1
So A2
=(PBP-1
)(PBP-1
)=PB2
P-1
Generally An
=PBn
P-1
Life is made easy is B is diagonal since we just raise entries to n.
14. Interesting Fact
Similar Matrices will have the same determinant.
Proof:
P-1
AP = D
det(D) = det (P-1
AP) = (detP-1
)(detA)(detP) = (1/detP)(detA)
(det P) = det A.
15. Example
Show that A and B are not similar.
A =
1 2
2 1
,B =
1 1
−1 1
Just need to show that they do not have the same determinant.
16. Trace
The trace of a square matrix A (tr A) is the sum of the entries
on the main diagonal of A.
17. Theorem 3
A,B (n x n), k is a scalar:
1. tr(A + B) = tr A + tr B and tr(kA) = k tr A
2. tr (AB) = tr (BA)
Proof:
1. (homework)
2. AB =
a1j
bj1
j=1
n
∑
a2 jbj2
j=1
n
∑
...
anj
bjn
j=1
n
∑
tr(AB) = aijbji
j=1
n
∑
i=1
n
∑ = bjiaij
i=1
n
∑
j=1
n
∑ = tr(BA)
18. Theorem 4
If A~B, they have the same determinant, the same rank, the same
trace, the same characteristic polynomial, and the same
eigenvalues. (similarity invariants)
Proof: Already shown that they have the same determinant.
Rank: Have B = P-1
AP
rank (B) = rank (P-1
AP) = rank(AP)=rankA since P is invertible
(and using cor 4 of thm 4 in 5.5)
tr B = tr (P-1
AP) = tr[(AP)P-1
] = tr (A) (uses thm 3)
19. Theorem 4 - cont
Characteristic polynomial
cB(x) = det (xI - B) = det(xI - P-1
AP)=det(P-1
xIP - P-1
AP)
(since xI = P-1
xIP -- since xI is diagonal)
= det [P-1
(xI - A)P]=(1/detP)(det(xI-A))(det P) = det(xI-A) = cA(x)
Eigenvalues: all matrices with the same characteristic poly will
have the same eigenvalues since the eigenvalues are the roots of
the characteristic polynomial.
20. Fact
The invariants do not imply similarity.
Ex. I =
1 0
0 1
, A =
1 2
0 1
Have same det,tr,rank,characteristic poly, eigenvalues, but are
not similar since P-1
IP = I A≠
21. Theorem 5
A,B,C (n x n). Then:
1. A~A for all A.
2. If A ~ B, then B~A
3. If A ~ B and B ~ C, then A~C.
Proof of 2 (others follow):
A~B ⇒ B = P-1
AP
Let Q = P-1
, then B = QAQ-1
, so A= Q-1
BQ
Which means that B ~ A.
22. Use of thm 5
Proving similarity is not always easy. But if we can find a simple
(often diagonal) matrix to which both A and B are both similar,
then: A~D and B~D means D~B by (2)
and A~B then by (3)