VCOLG(1)

💖 VCOLG 💖

okay bestie, welcome to vcolg, manual page for vcolg 2.9.3 — it's a User Command and it's about to be your whole personality 🎀

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✨ SYNOPSIS ✨

vcolg [-q] [-u|-T|-o|-O] [-e#|-e#:#] [-m#] [-c#,..,#] [-f#] [infile [outfile]]

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🌸 DESCRIPTION 🌸

so what does it do? it reads graphs or digraphs and colours their vertices in all possible ways with colours 0,1,2,.... that's it. that's the vibe. 💅

and here's the iconic part: isomorphic graphs derived from the same input are suppressed. and if the input graphs are non-isomorphic, then the output graphs are also. no cap. ✨

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🦋 the options (all of them, yes all of them)

• -e# | -e#:# — specify a value, or a range, of the total value of the colours 🎨
• -m# — number of available colours (default 2 if -c not given)
• -c#,..,# — specify the maximum number of vertices of each colour

The total must at least equal the number of vertices in the input. don't fumble this one bestie 😭

• -d#,..,# — minimum vertex degree for each colour (out-degree for digraphs)
• -D#,..,# — maximum vertex degree for each colour (out-degree for digraphs)
• -d and -D can have fewer colours than -m/-c but not more
• -f# — Use the group that fixes the first # vertices setwise
• -F# — As -f# but the first # vertices are given colour 0
• -T — Use a simple text output format (nv ne {col} {v1 v2})
• -o — Use sparse6 (undirected) or digraph6 (directed) for output,

provided m=2 and the inputs have no loops.

• -O — Same as -o but use loops for weight 0, not weight 1
• -u — no output, just count them 👀
• -q — suppress auxiliary information 🤫

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🌈 sign-off 🌈

that's the whole page, pookie. this was vcolg 2.9.3 from September 2026, brought to you by the lovely User Commands girlies. go colour some vertices, you absolute main character. 👑💜