Discover the foundational concepts of discrete mathematics with “Discrete Mathematics: An Open Introduction, Fourth Edition.” Tailored for first and second-year undergraduate math and computer science students, especially those aspiring to teach middle and high school, this book offers a unique problem-oriented and inquiry-based approach. Originally developed at the University of Northern Colorado, this revised edition serves as a vital bridge to advanced topics. It boasts over 750 exercises and examples, new sections on probability, relations, and discrete structures with proofs, making it an essential resource for a comprehensive understanding of discrete mathematics. This text is ideal for building a strong mathematical foundation.