title: Why do algorithms text book uses "nondecreasing" instead of "increasing" to mention sorted array?
body: <p>Is there any particular reason? or it's just the preference of author? 
  For example here's the Kruskal algorithm from CLRS: </p>
  
  <p><a href="https://i.stack.imgur.com/d2E4f.png" rel="noreferrer"><img src="https://i.stack.imgur.com/d2E4f.png" alt="Kruskal&#39;s algorithm"></a></p>