**Description**

This free undergraduate textbook provides an introduction to proofs/ logic/ sets/ functions/ and other fundamental topics of abstract mathematics. It is designed to be the textbook for a bridge course that introduces undergraduates to abstract mathematics/ but it is also suitable for independent study by undergraduates (or mathematically mature high-school students)/ or for use as a very inexpensive supplement to undergraduate courses in any field of abstract mathematics.

##### Items related to the subject *Mathematics*