@techreport{TR-IC-09-21,
  number = {IC-09-21},
  author = {Ana Paula Resende Malheiro and Jorge Stolfi},
  title = {Finding Minimal Bases in Arbitrary Spline Spaces},
  month = {June},
  year = {2009}, 
  institution = {Institute of Computing, University of Campinas},
  note = {In English, 21 pages.
    \par\selectlanguage{english}\textbf{Abstract}
      In  this  work  we  describe  a  general  algorithm  to  find  a
      finite-element basis with minimum total support for an arbitrary
      spline space, given  any basis for that same  space. The running
      time is exponential on $n$ in the worst case, but $O(n m^3)$ for
      many cases  of practical  interest, where $n$  is the  number of
      mesh cells and $m$ is the dimension of the spline space.  
  } 
}