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                     SPARSKIT MODULE ORDERINGS
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 The current directory ORDERINGS contains a few subroutines for
 finding some of the standard reorderings for a given matrix.

levset.f -- level set based algorithms

   dblstr   : doubled stripe partitioner 
   rdis     : recursive dissection partitioner
   dse2way  : distributed site expansion usuing sites from dblstr 
   dse      : distributed site expansion usuing sites from rdis
   BFS      : Breadth-First search traversal algorithm 
   add_lvst : routine to add a level -- used by BFS 
   stripes  : finds the level set structure
   stripes0 : finds a trivial one-way partitioning from level-sets 
   perphn   : finds a pseudo-peripheral node and performs a BFS from it.
   mapper4  : routine used by dse and dse2way to do center expansion
   get_domns: routine to find subdomaine from linked lists found by 
              mapper4. 
   add_lk   : routine to add entry to linked list -- used by mapper4. 
   find_ctr : routine to locate an approximate center of a subgraph. 
   rversp   : routine to reverse a given permutation (e.g., for RCMK)
   maskdeg  : integer function to compute the `masked' of a node

color.f  --  algorithms for independent set ordering and multicolor
            orderings

   multic  : greedy algorithm for multicoloring 
   indset0 : greedy algorithm for independent set ordering
   indset1 : independent set ordering using minimal degree traversal
   indset2 : independent set ordering with local minimization 
   indset3 : independent set ordering by vertex cover algorithm

ccn.f -- code for strongly connected components

    blccnx : Driver routine to reduce the structure of a  matrix 
             to its strongly connected components.
    cconex : Main routine to compute the strongly connected components
             of a (block diagonal) matrix.
    anccnx : We put in ICCNEX the vertices marked in the component MCCNEX.
    newcnx : We put in ICCNEX the vertices marked in the component
             MCCNEX. We modify also the vector KPW.
    blccn1 : Parallel computation of the connected components of a
             matrix. The parallel loop is performed only if the matrix
             has a block diagonal structure.
    icopy  : We copy an integer vector into anothoer.
    compos : We calculate the composition between two permutation
             vectors.
    invlpw : We calculate the inverse of a permutation vector.
    numini : We initialize a vector to the identity.
    tbzero : We initialize to ZERO an integer vector.
    iplusa : Given two integers IALPHA and IBETA, for an integer vector 
             IA we calculate IA(i) = ialpha + ibeta * ia(i)