The first version of these notes was written for a first-year graduate algebra course. As in most such courses, the notes concentrated on abstract groups and, in particular, on finite groups. However, it is not as abstract groups that most mathematicians encounter groups, but rather as algebraic groups, topological groups, or Lie groups, and it is not just the groups themselves that are of interest, but also their linear representations. It is my intention (one day) to expand the notes to take account of this, and to produce a volume that, while still modest in size (c200 pages), will provide a more comprehensive introduction to group theory for beginning graduate students in mathematics, physics, and related fields.
v2.01. (August 21, 1996). First version on the web; 57 pages.
v2.10. (January 28, 2002). Fixed misprints; made many improvements to the exposition; added an index, 80 exercises (30 with solutions), and an examination; 86 pages.
v2.11. (August 29, 2003). Fixed many minor errors; numbering unchanged; 85 pages.
v3.00. (September 1, 2007). Revised and expanded; 121 pages.
v3.01. (May 17, 2008). Very minor fixes and improvements; 124 pages.
v3.02. (Sept. 21, 2009). Minor corrections; changed TeX styles; 127 pages. pdf file for v3.02
v3.10. (Sept. 24, 2010). Many minor improvements; 131 pages. pdf file for v3.10
v3.11. (March 28, 2011). Minor additions; 135 pages.
v3.12. (April 9, 2012). Minor fixes; 133 pages.
v3.13. (March 15, 2013). Minor fixes; 135 pages.
v3.14. (March 17, 2017). Minor fixes; 135 pages.