**Welcome to Math 3110 Introduction to Theory of Numbers**

**University of Colorado, Boulder**

Monday, Wednesday, and Friday, 2:00 – 2:50 pm, ECCR 105

**Instructor**: Katherine Stange

**Email**: kstange at math colorado edu

**Office**: Math 308

**Phone**: (303) 492-3346

**Office hours**:

- 10 am on Tuesdays and 2 pm on Thursdays.
- The third hour is “floating” i.e. by appointment of first student who asks, then opened up to all.
- I will also meet privately by appointment for private matters (grades, etc.).
- But my apologies, please do not stop by unexpectedly.
**Please check for last-minute office hour changes on the daily posts.**

**Homework hours:**

- “Homework Hours”, meaning a designated time/place where you can meet others from your class to work on class material, are
**5 pm on Mondays and 4 pm on Thursdays in Gemmill.**I won’t be there, but your friends might.

**Official Course Description**

(a.k.a. Number Theory)

Studies the set of integers, focusing on divisibility, congruences, arithmetic functions, sums of squares, quadratic residues and reciprocity, and elementary results on distributions of primes.

Prerequisite: MATH 2001.

**My Unofficial Course Description**

Number theory is the study of the integers. The integers have two principal structures — addition and multiplication — whose interaction creates complex behaviour. We study the distribution of primes, integral solutions to polynomial equations, and similar questions. While I may dabble in applications such as cryptography, we study these questions as pure mathematics.

**My Policy on Influenza**

Please keep in mind that flu is potentially life-threatening to the very old, very young, and immune-compromised. **Please stay home if you are feverish or have a flu and may be contagious, and I will help you catch up.**

**University Policies**