Start Doing Graph Theory (vertex.degree)

181 points by ibobev 5 days ago

25 comments:

by gortok 20 minutes ago

A problem I didn’t even conceive of a year ago was whether or not a book was written by a human.

This author has done nothing to deserve that scrutiny, but I can’t escape the feeling now of having to be guarded when I see a new book online with a relatively short history (spring 2026 is the earliest version of this text), as I can’t be sure it’s either “AI-enhanced” or AI-written.

I don’t like this feeling and it dampers any enthusiasm I once had for being excited about stuff like this.

That aside, if the author did write this themselves without AI, kudos to them and their acheivement!

by layer8 11 minutes ago

I spot-checked a few random chapters, and it looks clearly human-written to me. But I share your general worry.

by hackerbrother an hour ago

Cool. I am applying to jobs and it seems graph theory is popular in the "Leet Code" questions pace. So very timely, thank you! And clever domain name :)

by mcv an hour ago

I've been doing a lot with graphs over the past couple of years. Basically since I started using neo4j, although not everything involves neo4j directly. I've developed a number of really interesting graph algorithms, but I'm always a bit disappointed by how little use I get out of my graph theory knowledge. I've never needed a Hamilton path or do something with the degrees of my vertices. It's all just logic and intuition.

But maybe I should read this to see if there's anything that applies to my current work.

by armcat an hour ago

Graphs are fantastic - PageRank [1] that powered Google Search (still does to some extent), TextRank for extractive text summarisation [2], Louvain for neighbourhood detection [3] all use graphs, as well as tonnes of others like belief propagation, Markov clustering, A*, and so on. So yeah, learn it.

[1] https://en.wikipedia.org/wiki/PageRank

[2] https://aclanthology.org/W04-3252.pdf

[3] https://en.wikipedia.org/wiki/Louvain_method

by matt_daemon 32 minutes ago

If you like graph theory Dijkstra’s in Disguise is a great read: https://blog.evjang.com/2018/08/dijkstras.html

Related HN thread: https://news.ycombinator.com/item?id=17745779

by igleria 2 hours ago

not super fond of my memories of having to come up with a graph demonstration on a fixed time on a paper exam, but at least I can say I was once a person that could do that!

by ultimaterr 28 minutes ago

what applications is this useful for? node topology is already a solved problem for decentralized networks since most validators are on aws. unless this is for fun? theres finite space to order nodes topologically speaking tbh

by vorobeez 2 hours ago

It's unfortunate that the book doesn't have solutions for practice problems. Which makes it hard to use for self-learning.

by OgsyedIE 2 hours ago

The book you want in this case is Gross, Yellen & Anderson, Graph Theory and its Applications, 3rd Edition.

There are plenty of ways to get a copy.

by eru an hour ago

You can ask Claude for the solutions?

by vorobeez an hour ago

Sure I can. But from my experience solutions in math books usually continue learning process and can provide even more insight to a problem. Solutions from ChatGPT or Claude barely can replace that.

(Edit) But I understand that goal of a book can be completely different. So it's just problem of my expectations.

by karmakurtisaani an hour ago

For elaborating something unclear they're great tho.

by Gormo an hour ago

If you don't have the solutions, how do you verify Claude's work?

by DecoPerson an hour ago

Everything, except the bleeding edge and situations requiring the context window to be more than 60% filled, are elementary to Opus 5.5 . If you provide the questions completely, you can be very sure that Claude’s solutions will be correct. The world has changed; AI is reliable; we need to adapt.

by adamddev1 15 minutes ago

> The world has changed; AI is reliable; we need to adapt.

Yes, but I think it's important to state that it's only reliable for things that are very well known and extensively written about.

by deredede an hour ago

According to current practices, you ask ChatGPT or DeepSeek to verify it.

by Gormo 21 minutes ago

Turtles all the way down, I guess.

by throwaw12 2 hours ago

that background is so annoying to my eyes when scrolling the content, would be great if author can fix it

by cedarbyte482 2 hours ago

This is great, graphs is also the answer to autonomous coding :D

by roarcher 2 hours ago

How so?

by cedarbyte482 2 hours ago

We have experienced that adverserial review cycles is the only way to really guarantee good outputs from coding agents - best modelled as a cyclic graph.

by sandos 2 hours ago

I am even more confused after this answer: Are the nodes actual reviews or something else?

by eru an hour ago

I don't think modelling this as a graph adds anything that you wouldn't get from the phrase 'adversarial review cycles' already. So graph theory is pretty much useless for this application.

Please prove me wrong.

by ultimaterr 21 minutes ago

what does neuron topology have to do with autonomous coding? MLP problem? doesn't make any sense

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