EconS 521, Fall 2015
Mathematics Primer for Economists
Tuesday, Thursday: 1:25 2:40 pm
3 Credits, Prerequisite EconS 101 or 198
This course is divided into two modules. This is the syllabus for Module 1.
Instructor for Module 1:
Basic Set Theory
A set is a collection of objects called elements or members. If x is an element of a set X , then it is written
as x X , and x X otherwise.
If A1 , A2 ,., An are objects, then the set consisting of precisely these objects
Due Sept. 8
Worth 15 points
1. (S&B 12.6) Prove that if cfw_ x n n=1 and cfw_ yn n=1 are sequences with limits x and y , respectively,
then the sequence cfw_ x n yn n=1 converges to the limit x y .
2. (S&B 12.8) Let cfw_ x n n=1 an