# Group Theory in Physics (Fall 2017)

Class Outline (updated on 10/20/2017, 10:25AM)

Office hours: T Th 4:15-5:00pm or by appointment, Yi Li, Bloomberg 339.

ANNOUNCEMENTS:

(10/20/17, 10:25AM) Please find updated homework and final project topics from the “Class Outline”.

(10/15/17, 10:35AM) You can find topics of final projects, its timelines and modified schedule of classes from the “Class Outline” at the top of this webpage. If you cannot find a final project suitable to you, please do not hesitate to send me an email or stop by my office for a five-minute chat.

(10/10/17, 7:20AM) You can find the two quizzes in our first five weeks here: Exit Ticket 1, Exit Ticket 2.

(10/6/2017, 12:30AM) We plan to have a special discussion session about selected homework problems by TA Suzy Zhang next Tuesday 4:20pm-5pm after our regular class. Welcome everyone join in and ask questions.

(10/4/2017, 3PM) Week 5 homework problems. (**Due on 10/9 (Monday) 11am**)

(9/30/2017, 10:10AM) Week 4 homework problems. (**Due on 10/3 (Tuesday) 3pm in class**)

(9/21/2017, 7:20PM) Week 3 homework problems. (Updated Prob. 3: The non-trivial 1D rep of group D_3 is constructed by taking the det of its 2D rep, (not the det of its 3D rep).)

(9/11/2017, 2:10PM) Week 2 homework problems.

(9/5/2017, 11:30AM) Week 1 homework problem 1: The group O(N) is the set of all orthogonal n by n matrices. a) Please verify that O(N), with matrix multiplication is indeed a group. b) Repeat part a) for SO(N), where S means unit determinant.

(9/5/2017, 11AM) Special office hour this Thursday: 4:15-5pm, 9/7/2017 by TA Suzy Zhang in Room 357.

MAIN TEXTBOOKS:

Howard Georgi, “Lie Algebras In Particle Physics: from Isospin To Unified Theories”, (Frontiers in Physics), Westview, 2nd Ed.

Dresselhaus, Dresselhaus, and Jorio, “Group Theory: Application to the Physics of Condensed Matter”, Springer, 2008. (JHU library has free access to its e-version)

ADDITIONAL MATERIALS:

Handout (10/3/17): Chapter 15 of “Mathematics for Physics” by M. Stone and P. Goldbart (reserved in library).

Handout (9/5/17): Chapter 14 of “Mathematics for Physics” by M. Stone and P. Goldbart (reserved in library).