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pickg

Langue: en

Version: 334601 (ubuntu - 24/10/10)

Section: 1 (Commandes utilisateur)

NAME

pickg - countg : Count graphs according to their properties.

SYNOPSIS

[pickg|countg] [-fp#:#q -V] [--keys] [-constraints -v] [ifile [ofile]]

DESCRIPTION

countg : Count graphs according to their properties.
pickg : Select graphs according to their properties.
ifile, ofile : Input and output files.
'-' and missing names imply stdin and stdout.
Miscellaneous switches:
-p# -p#:#
Specify range of input lines (first is 1)
-f
With -p, assume input lines of fixed length (only used with a file in graph6 format)
-v
Negate all constraints
-V
List properties of every input matching constraints.
-q
Suppress informative output.
Constraints:
Numerical constraints (shown here with following #) can take a single integer value, or a range like #:#, #:, or :#. Each can also be preceded by '~', which negates it. (For example, -~D2:4 will match any maximum degree which is _not_ 2, 3, or 4.) Constraints are applied to all input graphs, and only those which match all constraints are counted or selected.
-n#
number of vertices -e# number of edges
-d#
minimum degree -D# maximum degree
-r
regular -b bipartite
-z#
radius -Z# diameter
-g#
girth (0=acyclic) -Y# total number of cycles
-T#
number of triangles
-E
Eulerian (all degrees are even, connectivity not required)
-a#
group size -o# orbits -F# fixed points -t vertex-transitive
-c#
connectivity (only implemented for 0,1,2).
-i#
min common nbrs of adjacent vertices; -I# maximum
-j#
min common nbrs of non-adjacent vertices; -J# maximum
Sort keys:
Counts are made for all graphs passing the constraints.
Counts
are given separately for each combination of values occuring for the properties listed as sort keys. A sort key is introduced by '--' and uses one of the letters known as constraints. These can be combined: --n --e --r is the same as --ne --r and --ner. The order of sort keys is significant.
Leur crime, le mal cesse, clame l'émir cruel.
Leur état erra là, à l'arrêt à Teruel.
-- Roche, Jean