# CS22

Introduction to Discrete Structures & Probability

CS22 meets Mondays, Wednesdays, and Fridays from 1:00 - 1:50 pm.

I don't know about you, but we're feeling 22! This class gives you the tools to explore interesting questions and convince yourself and others of their answers. You'll be introduced to new worlds of ideas and ways of thinking. We'll learn about Set Theory, Logic, Number Theory, Combinatorics, Graph Theory, and Probability. If these topics sound unfamiliar, not to fear: you're in exactly the right place! This course assumes no prior experience with these topics.

Course Feedback Form Here!

# Assignments

All assignments after Homework 2 must be completed in LaTeX. Read about LaTeX here.

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# Hours

Refer to the calendar below for the most up-to-date TA hours. Professor Haddadan's office hours are TBD.

Recitation times are TBD.

# Documents

## Course Textbook

Mathematics for Computer Science — Lehman, Leighton, Meyer

Reading this textbook is not required, though many students in the past have found it helpful in reinforcing what's covered in lecture!

## Homework Resources

For many of you, this is your first time writing proofs, and even for those who have written proofs before, what we consider a good proof in CS22 likely differs from what made a good proof wherever you were writing them before! Check out the proof virtues document below to acquaint yourself with what we consider a good proof in CS22. Your proofs will be graded with respect to this document , so be sure to read it carefully, and come to hours with any questions.

• Proof Virtues — PDF

## LaTeX Resources

LaTeX (pronounced la-tek) is a program that you will be using to make your homework solutions look beautiful. The sample proofs above were written in LaTeX to give you an idea of what documents written in LaTeX look like. LaTeX allows you to incorporate mathematical notation into your proofs, and because this class involves a healthy dose of mathematical notation, LaTeX is going to be very useful! Using LaTeX is required after the 2nd homework.

We don't expect you've ever done this whole LaTeX business before, and that's why we're giving you some time to learn it! To get started, we recommend creating an account on Overleaf, an online program for writing and compiling LaTeX. After you do that, here are some links to check out:

Honestly, please use Overleaf. It's so much easier than installing anything on your computer. Trust me.

In general, a really good resource for learning LaTeX is the web. When you have a question, google it, and you'll likely find someone who had the very same question!

Below is a template you can use as a starting point for your homeworks.

LaTex Homework Template

If you'd like to download LaTeX on your computer, here are some resources to do that:

If you're using LaTeX and you just don't know what the code for some symbol is, here is a helpful list to start:

Common LaTeX symbols

Alternatively, this is a neat site which will return the LaTeX code based on handwritten input (although searching your question on the web is likely more efficient):

DeTeXify