: Complete scans of the 3rd and 4th editions are often uploaded to Scribd and Academia.edu .
As of 2022, the PDF version of "Elements of Discrete Mathematics" by C. L. Liu is still widely available online. However, some online sources may require subscription or purchase to access the PDF version. Additionally, some newer editions of the book may be available, which may include updated content and revisions. liu elements of discrete mathematics pdf upd
However, based on the phrasing, I am assuming you want a about the experience of a student trying to track down this specific "updated" PDF for their studies. : Complete scans of the 3rd and 4th