Discrete Mathematics and Its Application The Leading Text in Discrete Mathematics - Ease of Use-Exkey prokpanded and improved discussions, more steps and reasons in key proofs, templates for certain types of proofs, including mathematical induction, and the use of the Bourbaki dangerous bend symbol all make this edition a better teaching tool. - Enhanced Flexibility-The improved organization will help instructors customize their courses, making it easier to select chapters and sections to cover, and the needs of more instructions will be met with the earlier coverage of some key topics.