A PDF with the keyword will almost certainly include a notation legend. Always check the first two pages.
For a comprehensive guide on solving any Rubik's cube, the following papers and manuals provide both mathematical theory and step-by-step algorithms: Academic & Technical Papers Algorithms for Solving Rubik's Cubes (arXiv) xnxnxnxn cube algorithms pdf nxnxn rubik cube link
If you have stumbled across the search term or "nxnxn rubik cube link" , you are likely standing at the edge of a deep rabbit hole. While the "xnxnxnxn" notation looks like a typo or a string of keyboard smashing, in the cubing community, it points to a very specific concept: the generalized N×N×N Rubik’s Cube. A PDF with the keyword will almost certainly
Parity occurs when a cube’s permutation state is impossible on a 3x3. While the "xnxnxnxn" notation looks like a typo
For solving an NxNxN Rubik's cube , the standard method used is the Reduction Method