> [!important] **PLEASE NOTE: THIS VAULT IS MOVING!** > **This vault is currently being significantly expanded and updated to include concepts from MTH 325, the second semester of Discrete Structures for Computer Science**. **Please go to http://publish.obsidian.md/discretecs to access the new vault.** > > All of the material housed at the old vault (the one you're currently viewing) is already at the new vault, so for the first semester of the course you can use either one. However, **all further updates and improvements to existing articles will happen at the new vault and not here**. All offerings of MTH 225 and MTH 325 at Grand Valley State University will use the new vault instead, beginning with Spring session 2024. And, **this old vault will be taken offline at the end of the 2024 calendar year**. --- **Welcome to the course vault for MTH 225: Discrete Structures for Computer Science 1** at [Grand Valley State University](http://www.gvsu.edu). This website contains articles for all the important concepts in the course. The articles are **linked together** like Wikipedia articles so you can go from one article to any related article in one click. Many articles contain embedded video pulled from [the course video repository on Vimeo](https://vimeo.com/showcase/8667148) as well, which makes the vault our default "textbook". Each article has a **graph view** that visually shows the interconnections between the article and others. For example, the graph view for [[Predicate]] looks like this: ![[graphview.jpg|300]] Each article in the vault is a node in this network (or "graph"), and there is an edge between two nodes if there is a link from one article to the other. To jump to any connected article, just click on its node. Nodes in the graph that are greyed out (like "codomain" above) indicate articles that have not yet been written. Please note, the vault is constantly changing and so the graph view for an article today may not be the same tomorrow. Articles are being added, edited, or removed on a daily basis. See the bottom of this page for the most recent changelog. There is a secondary textbook for MTH 225 -- [Discrete Mathematics: An Open Introduction](https://discrete.openmathbooks.org/dmoi3.html) by Oscar Levin that you can use to go along with this vault in case you prefer a more traditional textbook approach or just want a second viewpoint on course concepts. However, this textbook does not cover all the topics in MTH 225, for example there is no coverage of computer arithmetic. The articles in this vault are also available in the public GitHub repository: https://github.com/RobertTalbert/mth225-vault **All files on this vault are licensed under a Creative Commons Attribution-NonCommercial 4.0 International license.** Click here for details: [https://creativecommons.org/licenses/by-nc/4.0/](https://creativecommons.org/licenses/by-nc/4.0/) > [!important] To report an issue or suggest an addition or edit > Use the [MTH 225 Vault Form](https://docs.google.com/forms/d/e/1FAIpQLSc6KV6Uk9CSC9X4FvTKU9IY2so2bhftelHFRoDTvOo6pfUYAQ/viewform) to do any of the following: > > **Suggest an addition or edit** including > - Requests for additional articles > - Suggestions for information or links to add to existing articles > - Suggestions for improvements to the layout or formatting of the vault > > **Report an issue** such as > - Dead or incorrect links to external websites > - Factual or computational errors > - Significant typographical errors > > Responses to the form will be addressed once per week and changes will be reported in the changelog below. ## Changelog ### 2024-02-23 - Fixed error in example in [[Set difference]]. ### 2023-11-06 * Added articles: [[Linear recurrence relation]], [[Homogeneous recurrence relation]], [[Characteristic root method]]. ### 2023-11-01 - Corrected typo in [[Arithmetic sequence]] - Added two complete induction proofs in the [[Mathematical induction]] article - Added article: [[Solution to a recurrence relation]]. - Did general cleanup, typo corrections, and addition of resources to the rest of the articles currently in the Recursion and Induction area. ### 2023-10-27 Added article: [[Dots and dividers]]. ### 2023-10-19 Added articles: [[Permutation]], [[k-Permutation]], [[License plate problem]]. ### 2023-10-17 - Fixed link to video in [[Binomial coefficient]]. - Added articles for [[Injective]], [[Surjective]], and [[Bijective]]. ### 2023-10-11 - Added articles for [[Factorial]] and [[Binomial coefficient]]. ### 2023-10-09 - Added articles for [[Additive principle]], [[Principle of Inclusion and Exclusion]], and [[Multiplicative principle]]. - Changed title of "Counting" folder to "Combinatorics". ### 2023-09-26 * Added articles for [[Recursion and Induction/Mathematical induction|Mathematical induction]], [[Union]], [[Intersection]], [[Set difference]], [[Complement]], [[Cartesian product]], and [[Symmetric difference]] and corrected typos * Added video to [[Recursion]] ### 2023-09-13 - Typo corrections to the [[Truth tables|truth tables]] and [[Existential quantifier|existential quantifier]] articles