The common definition for random walks moves only by unit vectors. Unfortunately, the information on Wikipedia is somewhat limited. The book "Random Walk: A M

The common definition for random walks moves only by unit vectors. Unfortunately, the information on Wikipedia is somewhat limited. The book "Random Walk: A Modern Introduction" (2010) by Gregory Lawler describes things in the first chapter, and is available online for free [1]. [1] https://www.math.uchicago.edu/~lawler/srwbook.pdf https://www.math.uchicago.edu/~lawler/srwbook.pdf