Last Modified on Sun, 16 Mar 2014, 00:41

Introduction to Topology
Course number: 20110091; Spring Semester 2014
Ben Gurion University of the Negev Department of Mathematics


Dr. Assaf Hasson
Office No. 204, Bldg 58.
Office hours: Sundays and Tuesdays 11:0012:00.
Class hours:
Sunday 13h15h, Bldg 32 class No. 309
Tuesday 12h14h, Bldg 72 class No. 217
The Grade
There will be 7 homework assignements, gradually published on this web
page. You will have to pass at least 5 of them in order to attend the
final exam. You can earn 10 points by grading handouts to one work
sheet, and writing its solutions. Both grading and homework submission
will be done in pairs.
The take home exam : to be electronically submitted not after Oct. 20th.
Syllabus and lecture notes
The course is intended to introduce the students to the basic concepts
of pointset topology. If time allows, we will try to give some flavour
of algebraic topology as well. We hope to cover:
 Introduction: basic
definitions and examples, metric spaces, construction of topological spaces,
connectedness and path connectedness, notions of convergence, Baire's theorem.
 Tychonov's Theorem: The
product topology, compactness, filters and ultrafilters and their
applications, Tychonov's theorem.
 Metrisability: Axioms of countability and separation, Urysohn's lemma, Urysohn's metrisability theorem. Some useful examples. The StoneCech compactification and some applications.
 The fundamental group of the circle:
Homotopy, the fundamental group, simply connected spaces, covering
spaces, computing the
fundamental group, VanKamppen's theorem (special case). Applications
(as time allows): Brouwer's fixed point theorem in the plane, the
fundamental group of the sphere, Jordan's theorem in the plane.
Important notice: though the lecture notes above cover practically
everything we will do in class, they were written for my personal
use, and therefore may contain typos and even mistakes. This is not,
by any means, the "official text" of the course.
RECOMMENDED BIBLIOGRAPHY:
The couse will not follow closely any textbook. Good references for almost all we will do are:
 Munkres, Topology (A first course).
 Kelley, General topology.
Though Kelley's book does not cover the last part of the course.
Exercises
Homework assignments, as well as homework grades, will be published on the webpage.
A recap exercise (and its solution) on pointset topology to help you sum up what we did in class in that part of the course. This assignment is not for submission.
All exercises should be submitted in class on Tuesdays. Any other form of submission will not be accepted.