Eigenvector centrality by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
This is the family of algorithms to which PageRank
Open PageRank implementation and data by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
This section is about more "open" PageRank implementations, notably using either or both of:
As of 2025, the most open and reproducible implementation appears to be whatever Common Crawl web graph official PageRank does, which is to use WebGraph. It's quite beautiful.
Intel employee grade by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
Common Crawl web graph by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
In 2017 apparently they've started making their own Web Graphs, i.e. they parse the HTML and extract the graph of what links to what.
This is exactly what we need for an open implementation of PageRank.
Edit: actually, they already calculate PageRank for us!!! Fantastic!!! Main section: Section "Common Crawl web graph official PageRank".
The graphs are dumped in BVGraph format.
A quick exploration of the graph can be seen at: github.com/cirosantilli/cirosantilli.github.io/issues/198
Intel department by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
Intel hardware by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
Intel employee by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
École Polytechnique alumnus by year by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
For example, Ciro Santilli's year started in 2009, though as a foreign student he arrived only at the start of 2010, and Ciro's promotion is usually known just as X09. And as the century barrier is broken we'll start to need to specify as X2009 one day.
Rob Pike by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
PhD thesis by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
WebGraph (software) by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
BVGraph by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
The native file format of WebGraph.
It is a binary format and highly storage efficient.
TODO meaning of "BV"?
A quick hands-on introduction to the format by Ciro Santilli can be found at: github.com/cirosantilli/cirosantilli.github.io/issues/198
Cancer research by Ciro Santilli 37 Created 2025-02-26 Updated 2025-07-16
I wanted to do a quick exploration of open PageRank implementation and data.
My general motivation for this is that a PageRank-like algorithm could be useful for more accurate user and article ranking on OurBigBook, see: Section "PageRank-like ranking"
But it could also be just generally cool to apply it to other graph datasets, e.g. for computing an Wikipedia internal PageRank.
A quick Google reveals only Open PageRank, but their methods are apparently closed source.
Then I had a look at the Common Crawl web graph data to see if I could easily calculate it myself, and... they already have it! See: Section "Common Crawl web graph official PageRank"
Their graph dumps are in BVGraph graph file format, which is the native format of the WebGraph framework, which implements the format and algorithms such as PageRank.
The only thing I miss is a command line interface to calculate the PageRank. That would be so awesome.
The more I look at it the more I love Common Crawl.
In cc-main-2024-25-dec-jan-feb-domain-ranks.txt:
  • cirosantilli.com was ranked ~453k
  • ourbigbook.com was at ~606k
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Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact