1mord(1)                      Scotch user's manual                      mord(1)
2
3
4

NAME

6       mord - compute sparse matrix orderings of meshes
7

SYNOPSIS

9       mord [options] [mfile] [ofile] [lfile]
10

DESCRIPTION

12       The mord program computes, in a sequential way, an ordering of a Scotch
13       source mesh representing the pattern of some symmetric  sparse  matrix.
14       Only  nodes  of the mesh are effectively ordered. Elements provide con‐
15       nectivity information, such that every node is considered to be  linked
16       to all of the nodes which share at least an element with it.
17
18       Source mesh file mfile can only be a centralized mesh file. The result‐
19       ing ordering is stored in  file  ofile.  Eventual  logging  information
20       (such  as  the  one  produced by option -v) is sent to file lfile. When
21       file names are not specified, data is  read  from  standard  input  and
22       written  to  standard  output. Standard streams can also be explicitely
23       represented by a dash '-'.
24
25       When the proper libraries have been included at compile time, gord  can
26       directly  handle  compressed meshes, both as input and output. A stream
27       is treated as compressed whenever its name is  postfixed  with  a  com‐
28       pressed  file  extension, such as in 'brol.msh.bz2' or '-.gz'. The com‐
29       pression formats which can be supported are the bzip2 format  ('.bz2'),
30       the gzip format ('.gz'), and the lzma format ('.lzma', on input only).
31

OPTIONS

33       -h     Display some help.
34
35       -mmfile
36              Save column block mapping data to file mfile. Mapping data spec‐
37              ifies, for each node vertex, the index of the  column  block  to
38              which this node vertex belongs.
39
40       -ostrat
41              Use  sequential  mesh ordering strategy strat (see Scotch user's
42              manual for more information).
43
44       -ttfile
45              Save partitioning tree data to  file  tfile.  Partitioning  tree
46              data  specifies,  for  each  node vertex, the index of the first
47              node vertex of the parent block of the block to which  the  node
48              vertex  belongs.  Altogether  with  the mapping data provided in
49              file mfile, it allows one to rebuild the separator tree  of  the
50              nested dissection process.
51
52       -V     Display program version and copyright.
53
54       -vverb Set  verbose mode to verb. It is a set of one of more characters
55              which can be:
56
57              s      strategy information.
58
59              t      timing information.
60

EXAMPLE

62       Reorder matrix mesh brol.msh and save the resulting  ordering  to  file
63       brol.ord using the default sequential mesh ordering strategy:
64
65             $ mord brol.msh brol.ord
66
67

SEE ALSO

69       gmk_msh(1), gotst(1), mtst(1).
70
71       Scotch user's manual.
72

AUTHOR

74       Francois Pellegrini <francois.pellegrini@labri.fr>
75
76
77
78                              September 08, 2008                       mord(1)
Impressum