Intro to Mathematical Logic

A professor said, In the west, only those top math depts have logicians, those mediocre ones do need logicians!! 

A decent program of logic should have
1. Intro to Mathematical Logic;
2. Set Theory;
3. Model Theory;
4. Computability Theory;
5. Proof Theory; and
6. Modal Logic...

So I found a famous book,

Introduction to Mathematical Logic, Fifth Edition 

Elliott Mendelson (Author)
http://www.amazon.com/Introduction-Mathematical-Discrete-Mathematics-Applications/dp/1584888768
原文地址:https://www.cnblogs.com/Torstan/p/2199178.html