A Simple Linear-Space Data Structure for Constant-Time Range Minimum   Query
  We revisit the range minimum query problem and present a new O(n)-space data structure that supports queries in O(1) time. Although previous data structures exist whose asymptotic bounds match ours, our goal is to introduce a new solution that is simple, intuitive, and practical without increasing costs for query time or space. 
Stephane Durocher
cs.DS