SUBDIVIDEG(1)

💖 SUBDIVIDEG(1) 💖

ok so bestie, welcome to subdivideg — it's the manual page for subdivideg version 2.9.3, and no, I'm not gonna make you read boring manpage voice, we're doing this together 🫶

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✨ NAME ✨

subdivideg — the manual page for subdivideg 2.9.3 💅 (yes, the name is the name, it's giving self-titled album energy)

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🎀 SYNOPSIS 🎀

subdivideg [-k#] [-i] [-q] [infile [outfile]]

like… that's the whole vibe. one line. main character. 👑

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🦋 DESCRIPTION 🦋

okay so here's the tea: subdivideg will make the subdivision graphs of a file of graphs, or it can do the inverse operation instead. pick your fighter ✨

• -k# — subdivide each edge by # new vertices (the default is 1, so if you don't say anything it's a chill single vertex per edge, no cap)
• -i — perform homeomorphic series reduction. and bestie, this one has rules, so listen up 🎧

For undirected graphs, it repeatedly replaces

x--y--z

by

x--z

if

x,y are not adjacent and y has no other neighbours.

For digraphs, it repeatedly replaces

x->y->z

by

x->z

if x,z are

distinct, x->z is not present, and y has no other neighbours.

💡 lil heads up: the output file has a header if and only if the input file does. that's the whole condition, it's a matching set, periodt 💖

• -q — suppress auxiliary information. aka quiet mode, aka not me being loud in the group chat 🫣

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🌸 ARGUMENTS 🌸

okay so you can pass files, they're optional but iconic:

• infile — the input file of graphs 💖
• outfile — the output file 🎀

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🌈 SEE ALSO 🌈

literally nothing else is listed here bestie, this page is a solo act 💀✨

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⚠️ real talk though: I didn't invent any of these behaviours, everything above is exactly what the page says — -k# defaults to 1, -i does the series reduction with those exact conditions, -q suppresses aux info, and the header rule is "if and only if". no guessing, no extra lore, that's the canon 🫶

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💖 that's the whole page, you ate it, you understood it, you're a Unix girlie now 💖

signing off with love: this was subdivideg 2.9.3, dated September 2026 — slay, bye bestie 👑🎀💅