Any relevant course materials will be posted here.

- You can find the current errata for the book here (PDF).
- Zach’s work for SP3 can be found here (PDF).
- Jimie’s work for SP4 can be found here (JPG).
- Click “Evaluate” on the SageMathCell below to check out the hyperplane arrangement $\mathcal{H}(3)$. The hyperplanes $H_{1,2}, H_{1,3}, H_{2,3}$ have been colored red, green, and blue, respectively. The plane $x+y+z=0$ is also included and is colored purple. In addition, I’ve included the vector $(1,2,3)$ in orange to illustrate where the chamber corresponding to the intersection of the three positive half-spaces lies. After evaluating the cell, it may take a few seconds for the image to render. You can click and drag the image to move it around and you can zoom in and out.

Below are links to the take-home portion of each exam.

- Exam 1 (take-home) (PDF). If you are interested in using LaTeX to type up your solutions, then you can obtain the .tex file for the exam here. (Due Wednesday, October 12)
- Exam 2 (take-home) (PDF). If you are interested in using LaTeX to type up your solutions, then you can obtain the .tex file for the exam here. (Due Wednesday, November 23)

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MAT 123: First Year Seminar

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MAT 526: Combinatorics

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Flagstaff and NAU sit at the base of the San Francisco Peaks, on homelands sacred to Native Americans throughout the region. The Peaks, which includes Humphreys Peak (12,633 feet), the highest point in Arizona, have religious significance to several Native American tribes. In particular, the Peaks form the Diné (Navajo) sacred mountain of the west, called Dook'o'oosłííd, which means "the summit that never melts". The Hopi name for the Peaks is Nuva'tukya'ovi, which translates to "place-of-snow-on-the-very-top". The land in the area surrounding Flagstaff is the ancestral homeland of the Hopi, Ndee/Nnēē (Western Apache), Yavapai, A:shiwi (Zuni Pueblo), and Diné (Navajo). We honor their past, present, and future generations, who have lived here for millennia and will forever call this place home.