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Inverse Complexity Lab

@invcomplexity.skewed.de

Research group @ IT:U, Austria, focusing on inverse problems in network science and complex systems. https://skewed.de/lab Led by Tiago Peixoto (@tiago.skewed.de).

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23.09.2024
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Latest posts by Inverse Complexity Lab @invcomplexity.skewed.de

New blog post:

"Higher orders need higher standards"

skewed.de/lab/posts/hi...

I discuss our current work disentangling misconceptions around "higher-order" networks: arxiv.org/abs/2602.16937

Explainer thread for the paper here: bsky.app/profile/tiag...

23.02.2026 09:38 πŸ‘ 40 πŸ” 21 πŸ’¬ 1 πŸ“Œ 3
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Graphs are maximally expressive for higher-order interactions We demonstrate that graph-based models are fully capable of representing higher-order interactions, and have a long history of being used for precisely this purpose. This stands in contrast to a commo...

New on the arxiv:

β€œGraphs are maximally expressive for higher-order interactions”

arxiv.org/abs/2602.16937

We clarify central misconceptions in the recent literature on "higher-order networks".

w/ @piratepeel.bsky.social , @manlius.bsky.social, and @thilogross.bsky.social

Explainer 🧡: 1/N

20.02.2026 08:03 πŸ‘ 94 πŸ” 36 πŸ’¬ 6 πŸ“Œ 11
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The perplexing β€œconnected cluster axiom” – Inverse Complexity Lab Research group on inverse problems in complex systems and network science.

I wrote a blog post about the often stated but never explained assumption that communities in graphs should always be connected.

This is inconsistent with statistical significance and null models that underlie the most widely employed methods.

skewed.de/lab/posts/co...

04.12.2025 21:10 πŸ‘ 51 πŸ” 15 πŸ’¬ 4 πŸ“Œ 0

Just out on @royalsocietypublishing.org:

"Scalable network reconstruction in subquadratic time"

royalsocietypublishing.org/doi/10.1098/...

Previous explainer thread here: bsky.app/profile/tiag...

Code here: graph-tool.skewed.de/static/docs/...

05.11.2025 08:11 πŸ‘ 17 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0

Double feature, just out on @royalsocietypublishing.org:

"Uncertainty quantification and posterior sampling for network reconstruction"

Previous explainer thread here: bsky.app/profile/tiag...

Code here: graph-tool.skewed.de/static/docs/...

royalsocietypublishing.org/doi/10.1098/...

05.11.2025 08:15 πŸ‘ 23 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0

Very happy that Lena joined the group! πŸš€

05.09.2025 09:28 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

πŸŽ“ Short interview with me by the lovely people at @cams.ehess.fr , where I wrapped up my PhD this summer ✨ In πŸ‡«πŸ‡·, with a longer version also available in πŸ‡¬πŸ‡§: shorturl.at/FjNRA

04.09.2025 14:58 πŸ‘ 11 πŸ” 4 πŸ’¬ 0 πŸ“Œ 1
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Last week we had our second β€œInverse Complexity Lab Retreat” at wonderful Traunkirchen!

skewed.de/lab/group.ht...

Nothing like eldritch C++ incantations by the sunny lakeside! πŸ–οΈ

08.08.2025 14:03 πŸ‘ 34 πŸ” 10 πŸ’¬ 0 πŸ“Œ 0

Tomorrow 1.30-2.30pm, poster ID 82

22.07.2025 11:43 πŸ‘ 8 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0

Attending @ic2s2.bsky.social? Checkout the poster presented by @thomrobiglio.bsky.social! #ic2s2

22.07.2025 08:40 πŸ‘ 10 πŸ” 3 πŸ’¬ 0 πŸ“Œ 1
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Multiscale patterns of migration flows in Austria: regionalization, administrative barriers, and urban-rural divides Migration is central in various societal problems related to socioeconomic development. While much of the existing research has focused on international migration, migration patterns within a single c...

New preprint: β€œMultiscale patterns of migration flows in Austria: regionalization, administrative barriers, and urban-rural divides”, with @thomrobiglio.bsky.social, Martina Contisciani, @martonkarsai.bsky.social, arxiv.org/abs/2507.11503

22.07.2025 08:38 πŸ‘ 21 πŸ” 10 πŸ’¬ 0 πŸ“Œ 1
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25 new scholarships for US researchers Fonds Zukunft Γ–sterreich (FZΓ–) is providing €10 million in funding for an academy program to bring postdocs from the USA to Austria ++ Faßmann: β€œThe right signal in these turbulent times”

Are you from the US and would like to work as a postdoc in Austria, maybe in our lab? 25 new fellowships will be available in July from the @oeaw.bsky.social: www.oeaw.ac.at/en/news/25-n...

If you are interested; get in touch!

29.06.2025 13:28 πŸ‘ 55 πŸ” 40 πŸ’¬ 1 πŸ“Œ 2
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25 new scholarships for US researchers Fonds Zukunft Γ–sterreich (FZΓ–) is providing €10 million in funding for an academy program to bring postdocs from the USA to Austria ++ Faßmann: β€œThe right signal in these turbulent times”

Are you from the US and would like to work as a postdoc in Austria, maybe in our lab? 25 new fellowships will be available in July from the @oeaw.bsky.social: www.oeaw.ac.at/en/news/25-n...

If you are interested; get in touch!

29.06.2025 13:28 πŸ‘ 55 πŸ” 40 πŸ’¬ 1 πŸ“Œ 2
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@invcomplexity.skewed.de bike train to @netsciconf.bsky.social

@ituaustria.bsky.social

04.06.2025 07:11 πŸ‘ 8 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0
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A couple of weeks ago we had our first β€œComplexity Lab Retreat” at great location in Traunkirchen!

skewed.de/lab/group.ht...

We had the opportunity to flex our methodological muscles and learn the dark secrets of the C++ internals of @graph-tool.skewed.de! πŸ’€πŸ€˜

24.04.2025 16:10 πŸ‘ 26 πŸ” 6 πŸ’¬ 1 πŸ“Œ 1

There will be more of these!

Any interest of participation from outside the group? πŸ€”

24.04.2025 16:10 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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A couple of weeks ago we had our first β€œComplexity Lab Retreat” at great location in Traunkirchen!

skewed.de/lab/group.ht...

We had the opportunity to flex our methodological muscles and learn the dark secrets of the C++ internals of @graph-tool.skewed.de! πŸ’€πŸ€˜

24.04.2025 16:10 πŸ‘ 26 πŸ” 6 πŸ’¬ 1 πŸ“Œ 1
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🚨 New paper on ArXiv:

β€œUncertainty quantification and posterior sampling for network reconstruction”

TL;DR; We present an efficient method to sample the entire ensemble of possible network reconstructions that are compatible with an indirect observation, e.g. a dynamics.

Short thread: 1/N

12.03.2025 11:57 πŸ‘ 165 πŸ” 53 πŸ’¬ 10 πŸ“Œ 5

go.bsky.app/5hRft3g

19.02.2025 08:09 πŸ‘ 12 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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Good news for Arch GNU/Linux users! Graph-tool is now available in the main repository! To install it, just do:

pacman -S python-graph-tool

The days of compiling graph-tool from AUR are over!

Rejoice! πŸŽ‰

03.01.2025 17:45 πŸ‘ 14 πŸ” 5 πŸ’¬ 0 πŸ“Œ 1

Get 2025 started by reducing your compile times!

graph-tool.skewed.de

03.01.2025 17:48 πŸ‘ 17 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Professor of Data Science | IT:U

🚨 Job alert 🚨

IT:U is hiring 5 professors (open rank) in Data Science, very broadly defined!

Focuses include (among others):

1. Theoretical Foundations of Data Science
2. Data Science in Biological Systems
3. Data Science in Human Mobility

it-u.at/en/careers/p... 1/2

20.12.2024 18:54 πŸ‘ 61 πŸ” 43 πŸ’¬ 2 πŸ“Œ 7
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Good news everyone! A new version of graph-tool is just out! @graph-tool.skewed.de

graph-tool.skewed.de

Graph-tool is a comprehensive and efficient Python library to work with networks, including structural, dynamical, and statistical algorithms, as well as visualization. 1/N

#networkscience

02.12.2024 12:55 πŸ‘ 344 πŸ” 98 πŸ’¬ 8 πŸ“Œ 4
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Open post-doc position at the Inverse Complexity Lab – Tiago P. Peixoto Inverse Complexity Lab

🚨Job alert!🚨

Come join us at the Inverse Complexity Lab @invcomplexity.skewed.de

We’re hiring a post-doctoral researcher to join our group at IT:U, Linz, Austria.

skewed.de/lab/call.html

Deadline is 30 Nov 2024. (Next Saturday!)

Spread the word.

#networkscience #complexsystems

25.11.2024 08:06 πŸ‘ 20 πŸ” 27 πŸ’¬ 1 πŸ“Œ 2

Did you know that you install @graph-tool.skewed.de via @condaproject.bsky.social, it will install binaries that are
optimized for your specific CPU micro-architecture, including SIMD vectorization, in addition to having OpenMP enabled?
It's awesome! Try it out today!

13.11.2024 21:40 πŸ‘ 6 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

Great postdoc opportunity to wrok with @skewed.de at the Inverse Complexity Lab (@invcomplexity.bsky.social) at the new university IT:U in Linz.

#Complexity πŸ§ͺ

11.11.2024 22:30 πŸ‘ 8 πŸ” 5 πŸ’¬ 1 πŸ“Œ 0
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🚨Job alert!🚨
Come join us at the Inverse Complexity Lab! @invcomplexity.bsky.social

We’re hiring a post-doctoral researcher to join our group at IT:U, Linz, Austria.

skewed.de/lab/call.html

Deadline is 30 Nov 2024.

1/8

15.10.2024 15:57 πŸ‘ 47 πŸ” 33 πŸ’¬ 1 πŸ“Œ 8
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Inverse Complexity Lab – Tiago P. Peixoto Inverse Complexity Lab

Hello world! We're a research group led by Tiago Peixoto (@skewed.de) at the newly founded IT:U, Linz, Austria.

We focus on inverse problems in network science and complex systems.

Learn more at: skewed.de/lab

Follow this account to get scientific updates!

#NetSci #NetSky #ComplexSystems

24.09.2024 19:36 πŸ‘ 11 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0

FolIow, if you want to be updated about all the inverse complexity we are doing!

23.09.2024 16:48 πŸ‘ 5 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

Hello world! We're a research group led by @skewed.de at the newly founded IT:U, Linz, Austria.

We focus on inverse problems in network science and complex systems.

Follow this account to get scientific updates!

23.09.2024 16:23 πŸ‘ 9 πŸ” 4 πŸ’¬ 1 πŸ“Œ 1