Modern Algebra 1 - Spring 2021

Niels Henrik Abel, 1802-1829

Evariste Galois, 1811-1832

Peter Ludwig Sylow, 1832-1918

Emmy Noether, 1882-1935

The Spring 2021 class

COURSE: MATH 5410-001, Call # 13370

TIME AND PLACE: 2:15-3:35, Online through Zoom

INSTRUCTOR: Dr. Robert Gardner OFFICE HOURS: By appointment

OFFICE: Room 308F of Gilbreath Hall

PHONE: 439-6979 (308F Gilbreath), Math Department Office 439-4349

E-MAIL:gardnerr@etsu.edu
WEBPAGE: http://faculty.etsu.edu/gardnerr/gardner.htm (see my webpage for a copy of this course syllabus, copies of the classnotes in PDF, and updates for the course).

TEXT: Algebra, by Thomas W. Hungerford (1974).

CLASS NOTES: We will use digital notes for the presentation of definitions, examples, and proofs of some theorems. Limited marginal notes, additional examples, and further explanations will be given using handwritten notes and a document camera. Copies of the Modern Algebra 1 group theory notes are online. You should read the online notes to be covered in class before each class (we may not have class time to cover every little detail in the online notes). Try to understand the definitions, the examples, and the meanings of the theorems. After each class, you should read the section of the book covered in that class, paying particular attention to examples and proofs.

VIDEOS: Each lecture will be recorded in Zoom and posted on D2L. The plan is to have videos prepared for each section covered (independent of the recorded lectures). Videos are accessible through my Online Modern Algebra: Groups webpage which includes links to ETSU's Panopto Host.

ADDITIONAL REFERENCES:
A First Course in Abstract Algebra, 7th Edition, John B. Fraleigh, NY: Addison-Wesley, 2003.
Abstract Algebra, 3rd Edition, David S. Dummit and Richard M. Foote, Hoboken, NJ: John Wiley and Sons, 2004.
Visual Group Theory by Nathan Carter, New York: Mathematical Association of America, 2009. I will use this resource for some motivational and geometric examples.
A History of Abstract Algebra, by Isreal Kleiner, Boston: Birkhauser, 2007. As time permits, I will insert some historical comments and this is a reliable source of such information.

PREREQUISITE: As the ETSU catalog states, the prerequisite for this class is Introduction to Modern Algebra (MATH 4127/5127).

HOMEWORK: YOU MUST SHOW ALL DETAILS ON THE HOMEWORK PROBLEMS!!! Justify every step and claim you make - this is how you convince me that you know what you are doing. You may find some answers online, but these rarely sufficiently justify all steps and are unacceptable as homework solutions.

ACADEMIC MISCONDUCT: While I suspect that you may work with each other on the homework problems (in fact, I encourage you to), I expect that the work you turn in is your own and that you understand it. Some of the homework problems are fairly standard for this class, and you may find proofs online or in an online version of the solutions manual. The online proofs may not be done with the notation, definitions, and specific methods which we are developing and, therefore, are not acceptable for this class. If I get homework from two (or more) of you that is virtually identical, then neither of you will get any credit. If you copy homework solutions from an online source, then you will get no credit. These are examples of plagiarism and I will have to act on this as spelled out on ETSU's "Academic Integrity @ ETSU" webpage: http://www.etsu.edu/academicintegrity/ (last accessed 6/29/2019). To avoid this, do not copy homework and turn it in as your own!!! Even if you collaborate with someone, if you write the homework problems out in such a way that you understand all of the little steps and details, then it will be unique and your own work. If your homework is identical to one of your classmates, with the exception of using different symbols/variables and changing "hence" to "therefore," then we have a problem! If you copy a solution from a solution manual or from a website, then we have a problem! I will not hesitate to charge you with academic misconduct under these conditions. When such a charge is lodged, the dean of the School of Graduate Studies is contacted. Repeated or flagrant academic misconduct violations can lead to suspension and/or expulsion from the university (the final decision is made by the School of Graduate studies and the graduate dean, Dr. McGee).

GRADING: Since this is an online class, your grade will be determined by the average on the assigned homework exercises. Grades will be assigned based on a 10 point scale with "plus" and "minus" grades being assigned on a 3 point subscale (for example, a 90, 91, 92 is an A-).

DESIRE2LEARN: I will not rely on the Desire2Learn ("elearn") website. Instead, I will simply post all material directly on the internet. However, I will post your homework grades on D2L.

NOTE: When we compare the undergraduate and graduate analysis sequences, we see that the material covered in the graduate class consists mostly of generalizations of the undergraduate material (for example, the undergraduate class covers Riemann integration and the graduate class covers Lebesgue measure and Lebesgue integration). This is not the case for the undergraduate and graduate algebra sequences, however. In Introduction to Modern Algebra 1 and 2 (MATH 4127/5127, MATH 4137/5137) you are introduced to the structures of modern algebra (groups, rings, fields, quotient groups, ideals, extension fields, algebraically closed fields, solvable polynomial equations). You elaborate on these structures with many examples and state numerous theorems which illustrate the properties and relations between them. However, there is only enough time to prove a limited number of the results. In this graduate sequence, we assume a familiarity with the structures discussed and go into more depth and many more proofs. In this class, we try to cover all of the material on group theory (sections I.1 through II.8 in the text).

SYLLABUS ATTACHMENT: You can find an on-line version of the university's syllabus attachment (which contains general information concerning advisement, honor codes, dropping, etc.; last accessed 1/5/2021).

IMPORTANT DATES: (see the official ETSU calendar for more details; accessed 1/5/2021):

The ETSU Abstract Algebra Club
As a student in this class, you will be enrolled in the ETSU Abstract Algebra Club. A description of the club is online here. We should have at least one formal meeting per semester.

Other Supplemental Material

Our tentative schedule for the year is as follows:

MODERN ALGEBRA 1
I.1. Semigroups, Monoids, and Groups
I.2. Homomorphisms and Subgroups
I.3. Cyclic Groups
I.4. Cosets and Counting
I.5. Normality, Quotient Groups, and Homomorphisms
I.6. Symmetric, Alternating, and Dihedral Groups
I.7. Categories: Products, Coproducts, and Free Objects
I.8. Direct Products and Direct Sums
I.9. Free Groups, Free Products, Generators & Relations
II.1. Free Abelian Groups
II.2. Finitely Generated Abelian Groups
II.3. The Krull-Schmidt Theorem
II.4. The Action of a Group on a Set
II.5. The Sylow Theorems
II.6. Classification of Finite Groups
Supplement: Direct Products and Semidirect Products (time permitting)
II.7. Nilpotent and Solvable Groups (time permitting)
II.8. Normal and Subnormal Series (time permitting)

Homework

Section
Problems
Solutions
Due Date
Points
I.1. Semigroups, Monoids, and Groups
I.1.5, I.1.8, I.1.10
Solutions
Wednesday, January 27
5 + 5 + 5 = 15
I.2. Homomorphisms and Subgroups
I.2.2, I.2.6, I.2.8
Solutions
Wednesday, February 3
5 + 5 + 5 = 15
I.3. Cyclic Groups
I.3.7(a), I.3.8, I.3.10
Solutions
Wednesday, February 10
5 + 5 + 5 = 15
I.4. Cosets and Counting
I.4.4, I.4.6, I.4.11
Solutions
Friday, February 19
5 + 5 + 5 = 15
I.5. Normality, Quotient Groups, and Homomorphisms
I.5.1, I.5.4, I.5.9(a)
Solutions
Friday, February 26
5 + 5 + 5 = 15
I.5. Normality, Quotient Groups, and Homomorphisms
I.6. Symmetric, Alternating, and Dihedral Groups
I.5.16, I.5.18
I.6.3
Solutions
Friday, March 5
5 + 5 + 5 = 15
I.6. Symmetric, Alternating, and Dihedral Groups
I.6.6, I.6.9, I.6.12
Solutions
Friday, March 12
5 + 5 + 5 = 15
I.8. Direct Products and Direct Sums
I.8.D, I.8.A, I.8.9
Solutions
Friday, March 26
5 + 5 + 5 = 15
I.9. Free Groups, Free Products, Generators & Relations
I.9.1, I.9.2, I.9.5
Solutions
Friday, April 2
5 + 5 + 5 = 15
I.9. Free Groups, Free Products, Generators & Relations
II.4. The Action of a Group on a Set
I.9.8, I.9.B
II.4.1(a)
Solutions
Friday, April 9
5 + 5 + 5 = 15
II.4. The Action of a Group on a Set
II.4.3, II.4.4, II.4.7
Solutions
Friday, April 16
5 + 5 + 5 = 15
II.5. The Sylow Theorems
II.5.2, II.5.5, II.5.6
Solutions
Wednesday, April 28
5 + 5 + 5 = 15
TOTAL
-
-
-
180
The numbers in parentheses represent bonus problems.


Return to Bob Gardner's home page
Last updated: April 20, 2021.