![Screenshot of discrete.openmathbooks.org: Discrete Mathematics: An Open Introduction [pdf]](https://hn.urlbox.com/shots/renders/2025/6/10/52059dc3-911e-4715-8553-a71f523af8c0.jpg)
discrete.openmathbooks.org on Hacker News
2 stories on the front page, newest first. Scroll down to watch the site change over time.
Discrete Mathematics – An Open Introduction, 4th edition(discrete.openmathbooks.org)
396 points by yawboakye | 42 comments
Announcement page for the 4th edition of Oscar Levin's free open textbook Discrete Mathematics: An Open Introduction, with links to read online.