Kleber Oliveira
@kleber-ao.com
Computational mathematician @unioflimerick.bsky.social. (Social) network dynamics and information spreading.
Pinned
Kleber Oliveira
@kleber-ao.com
· Apr 29
Rumor propagation on hypergraphs
The rapid spread of information and rumors through social media platforms, especially in group settings, motivates the need for more sophisticated models of rumor propagation. Traditional pairwise mod...
arxiv.org
Now out: "Rumor propagation on hypergraphs" (arxiv.org/abs/2504.19305). We propose a higher-order rumour model incorporating a group-based annihilation mechanism. We run computational experiments to characterise the model's dynamics in synthetic and real systems... 1/5
Reposted by Kleber Oliveira
Come and do a PhD at Exeter with me and Chico Camargo (Computer Science) on human-genAI coevolution
"Leveraging Natural Language Processing for Data-Driven Agent-Based Modelling of Online Cultural Dynamics"
www.exeter.ac.uk/v8media/recr...
More details here:
www.exeter.ac.uk/study/fundin...
"Leveraging Natural Language Processing for Data-Driven Agent-Based Modelling of Online Cultural Dynamics"
www.exeter.ac.uk/v8media/recr...
More details here:
www.exeter.ac.uk/study/fundin...
www.exeter.ac.uk
November 14, 2025 at 3:14 PM
Come and do a PhD at Exeter with me and Chico Camargo (Computer Science) on human-genAI coevolution
"Leveraging Natural Language Processing for Data-Driven Agent-Based Modelling of Online Cultural Dynamics"
www.exeter.ac.uk/v8media/recr...
More details here:
www.exeter.ac.uk/study/fundin...
"Leveraging Natural Language Processing for Data-Driven Agent-Based Modelling of Online Cultural Dynamics"
www.exeter.ac.uk/v8media/recr...
More details here:
www.exeter.ac.uk/study/fundin...
Reposted by Kleber Oliveira
One week left to apply to the UVA Biology PhD program! If you or someone you know are interested in contagion from a complex systems perspective, please reach out! I'm looking for a grad student! bio.as.virginia.edu/how-apply-gr...
How to Apply to the Graduate Program
bio.as.virginia.edu
November 25, 2025 at 4:31 PM
One week left to apply to the UVA Biology PhD program! If you or someone you know are interested in contagion from a complex systems perspective, please reach out! I'm looking for a grad student! bio.as.virginia.edu/how-apply-gr...
Reposted by Kleber Oliveira
I think the shortest version of why LLMs are an anti education technology is that education is fundamentally about making shared context to understand ourselves, each other, and the world
And by design LLMs destroy shared context
And by design LLMs destroy shared context
November 23, 2025 at 12:57 PM
I think the shortest version of why LLMs are an anti education technology is that education is fundamentally about making shared context to understand ourselves, each other, and the world
And by design LLMs destroy shared context
And by design LLMs destroy shared context
Reposted by Kleber Oliveira
"Access to data by researchers is a crucial element of ensuring transparency and democratic accountability,” @lewan.bsky.social says. “The public is entitled to know what platforms and their algorithms are doing to the information landscape.”
I wrote for @science.org about Meta, TikTok and the DSA 🧪
I wrote for @science.org about Meta, TikTok and the DSA 🧪
Meta and TikTok are obstructing researchers’ access to data, European Commission rules
Data are needed to study how social media spreads misinformation and influences elections, scientists say
www.science.org
October 29, 2025 at 7:24 PM
"Access to data by researchers is a crucial element of ensuring transparency and democratic accountability,” @lewan.bsky.social says. “The public is entitled to know what platforms and their algorithms are doing to the information landscape.”
I wrote for @science.org about Meta, TikTok and the DSA 🧪
I wrote for @science.org about Meta, TikTok and the DSA 🧪
Reposted by Kleber Oliveira
arXiv alert! 📄🚨
A review paper about the physics of news, rumors, and opinions
arxiv.org/abs/2510.15053
w @manlius.bsky.social @sarawalk.bsky.social Guido Cadarelli et al.
A review paper about the physics of news, rumors, and opinions
arxiv.org/abs/2510.15053
w @manlius.bsky.social @sarawalk.bsky.social Guido Cadarelli et al.
The Physics of News, Rumors, and Opinions
The boundaries between physical and social networks have narrowed with the advent of the Internet and its pervasive platforms. This has given rise to a complex adaptive information ecosystem where ind...
arxiv.org
October 20, 2025 at 6:32 AM
arXiv alert! 📄🚨
A review paper about the physics of news, rumors, and opinions
arxiv.org/abs/2510.15053
w @manlius.bsky.social @sarawalk.bsky.social Guido Cadarelli et al.
A review paper about the physics of news, rumors, and opinions
arxiv.org/abs/2510.15053
w @manlius.bsky.social @sarawalk.bsky.social Guido Cadarelli et al.
Reposted by Kleber Oliveira
📣 NEW -- In The Economist, discussing the privacy perils of AI agents and what AI companies and operating systems need to do--NOW--to protect Signal and much else!
www.economist.com/by-invitatio...
www.economist.com/by-invitatio...
September 9, 2025 at 11:44 AM
📣 NEW -- In The Economist, discussing the privacy perils of AI agents and what AI companies and operating systems need to do--NOW--to protect Signal and much else!
www.economist.com/by-invitatio...
www.economist.com/by-invitatio...
Reposted by Kleber Oliveira
Uncritical adoption of AI “undermines our basic pedagogical values and principles of scientific integrity. It prevents us from maintaining our standards of independence & transparency. And most concerning, AI use … hinder[s] learning and deskill critical thought.” openletter.earth/open-letter-...
Open Letter: Stop the Uncritical Adoption of AI Technologies in Academia
openletter.earth
July 26, 2025 at 7:08 PM
Uncritical adoption of AI “undermines our basic pedagogical values and principles of scientific integrity. It prevents us from maintaining our standards of independence & transparency. And most concerning, AI use … hinder[s] learning and deskill critical thought.” openletter.earth/open-letter-...
"The order, aggravated by Trump's illegal attempt on intervening on Brazil's sovereign institutions, comes before..." -- there you go, corrected it for you in case you have any spine left and would call it as is
July 18, 2025 at 3:53 PM
"The order, aggravated by Trump's illegal attempt on intervening on Brazil's sovereign institutions, comes before..." -- there you go, corrected it for you in case you have any spine left and would call it as is
Reposted by Kleber Oliveira
We ran a randomized controlled trial to see how much AI coding tools speed up experienced open-source developers.
The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.
The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.
July 10, 2025 at 7:47 PM
We ran a randomized controlled trial to see how much AI coding tools speed up experienced open-source developers.
The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.
The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.
Reposted by Kleber Oliveira
With everything else going on, I'm not sure people realize that Trump's latest tariff on Brazil took things to a new (lower) level
paulkrugman.substack.com/p/trumps-dic...
paulkrugman.substack.com/p/trumps-dic...
Trump's Dictator Protection Program
Using tariffs to fight democracy
paulkrugman.substack.com
July 9, 2025 at 11:02 PM
With everything else going on, I'm not sure people realize that Trump's latest tariff on Brazil took things to a new (lower) level
paulkrugman.substack.com/p/trumps-dic...
paulkrugman.substack.com/p/trumps-dic...
Funny thing, "there are many Brazilians on this platform" exactly because another platform refused to comply with the most basic things to operate in the country, such as having legal representation.
Maybe we wait and see on this one before announcing it's the death of social media?
Maybe we wait and see on this one before announcing it's the death of social media?
June 14, 2025 at 11:16 PM
Funny thing, "there are many Brazilians on this platform" exactly because another platform refused to comply with the most basic things to operate in the country, such as having legal representation.
Maybe we wait and see on this one before announcing it's the death of social media?
Maybe we wait and see on this one before announcing it's the death of social media?
Reposted by Kleber Oliveira
the Brazilian replies to this post will take you on a fucking journey
A Brazilian comedian has been sentenced to 8 years in prison for ‘bigoted’ jokes told in 2022. The decision marks the latest effort by Brazil to place limits on freedom of expression.
Brazilian comedian sentenced to 8 years in prison for ‘bigoted’ jokes
The ruling against comedian Leo Lins for jokes told in 2022 is shaping up as the next front in Brazil’s escalating struggle over freedom of expression.
www.washingtonpost.com
June 8, 2025 at 1:08 AM
the Brazilian replies to this post will take you on a fucking journey
Reposted by Kleber Oliveira
If you're looking for a quite handy multitype branching process framework for modeling diffusion in networks with communities check this work by @davidjpos.bsky.social and friends. @netsciconf.bsky.social #netsci2025
June 5, 2025 at 9:48 AM
If you're looking for a quite handy multitype branching process framework for modeling diffusion in networks with communities check this work by @davidjpos.bsky.social and friends. @netsciconf.bsky.social #netsci2025
Fully-funded PhD positions to work with a fantastic team (and me 🫠) in a beautiful campus. Please share it with people who may be interested! Deadline on the 10th of July.
We're offering two funded PhD studentships in the ERC-Funded ID-Compression project at the University of Limerick, Ireland -- please pass on to any kind, curious & talented candidates who might be interested. Thank you! @csi-research.bsky.social
www.dropbox.com/scl/fi/svvz1...
www.dropbox.com/scl/fi/svvz1...
June 5, 2025 at 5:13 PM
Fully-funded PhD positions to work with a fantastic team (and me 🫠) in a beautiful campus. Please share it with people who may be interested! Deadline on the 10th of July.
Reposted by Kleber Oliveira
We often suppose that things like intelligence and opinions not only exist, but can be measured in a “correct” way. So our goal is to reduce the error as much as possible to get closer and closer to such “correct” measurement. [1/7]
May 13, 2025 at 7:56 AM
We often suppose that things like intelligence and opinions not only exist, but can be measured in a “correct” way. So our goal is to reduce the error as much as possible to get closer and closer to such “correct” measurement. [1/7]
On top of leaning towards this with the usual networks + nonlinear dynamics toolkit (I suppose I will be able to call myself a computational social scientist at some stage?), we will deal with a good amount of information theory. Feel free to reach out if you are curious about the project's details!
May 12, 2025 at 1:07 PM
On top of leaning towards this with the usual networks + nonlinear dynamics toolkit (I suppose I will be able to call myself a computational social scientist at some stage?), we will deal with a good amount of information theory. Feel free to reach out if you are curious about the project's details!
Glad to share that next month I am joining @mikeq.bsky.social's group on a full-time research position in my alma mater.
I've been studying social systems for some time, but never from the theoretical foundations of how people act towards each other (which are from social psychology).
I've been studying social systems for some time, but never from the theoretical foundations of how people act towards each other (which are from social psychology).
May 12, 2025 at 1:07 PM
Glad to share that next month I am joining @mikeq.bsky.social's group on a full-time research position in my alma mater.
I've been studying social systems for some time, but never from the theoretical foundations of how people act towards each other (which are from social psychology).
I've been studying social systems for some time, but never from the theoretical foundations of how people act towards each other (which are from social psychology).
Reposted by Kleber Oliveira
Good piece in Science by @kakape.bsky.social on the massive censorship of scientific work by the U.S. government - all in the name of free speech, presumably: www.science.org/content/arti...
Trump’s team, often accused of spreading misinformation, slashes misinformation research
Hundreds of grants axed in a field where the United States was a global leader
www.science.org
May 1, 2025 at 7:37 AM
Good piece in Science by @kakape.bsky.social on the massive censorship of scientific work by the U.S. government - all in the name of free speech, presumably: www.science.org/content/arti...
I am really glad I had the opportunity to work with co-authors who are so knowledgeable on the topic. Thanks very much @pietrotraversa.bsky.social @ymoreno.bsky.social and @guifarruda.bsky.social for the amazing work. Be sure to check the pre-print.
April 29, 2025 at 1:55 PM
I am really glad I had the opportunity to work with co-authors who are so knowledgeable on the topic. Thanks very much @pietrotraversa.bsky.social @ymoreno.bsky.social and @guifarruda.bsky.social for the amazing work. Be sure to check the pre-print.
Our comparison of the model against empirical data also provides additional evidence that real-world rumor propagation tends to occur near criticality, opening the door to a more detailed understanding of rumor dynamics in Higher-order systems. 4/5
April 29, 2025 at 1:55 PM
Our comparison of the model against empirical data also provides additional evidence that real-world rumor propagation tends to occur near criticality, opening the door to a more detailed understanding of rumor dynamics in Higher-order systems. 4/5
Interestingly, our analysis reveals continuous transitions in both homogeneous and heterogeneous hypergraphs, challenging the idea that higher-order interactions necessarily lead to discontinuous transitions. 3/5
April 29, 2025 at 1:55 PM
Interestingly, our analysis reveals continuous transitions in both homogeneous and heterogeneous hypergraphs, challenging the idea that higher-order interactions necessarily lead to discontinuous transitions. 3/5
and then compare it with empirical rumour cascades reconstructed from Telegram and a dataset of e-mail threads. We show that the model has two distinct subcritical behaviors that can coexist. 2/5
April 29, 2025 at 1:55 PM
and then compare it with empirical rumour cascades reconstructed from Telegram and a dataset of e-mail threads. We show that the model has two distinct subcritical behaviors that can coexist. 2/5
Now out: "Rumor propagation on hypergraphs" (arxiv.org/abs/2504.19305). We propose a higher-order rumour model incorporating a group-based annihilation mechanism. We run computational experiments to characterise the model's dynamics in synthetic and real systems... 1/5
Rumor propagation on hypergraphs
The rapid spread of information and rumors through social media platforms, especially in group settings, motivates the need for more sophisticated models of rumor propagation. Traditional pairwise mod...
arxiv.org
April 29, 2025 at 1:55 PM
Now out: "Rumor propagation on hypergraphs" (arxiv.org/abs/2504.19305). We propose a higher-order rumour model incorporating a group-based annihilation mechanism. We run computational experiments to characterise the model's dynamics in synthetic and real systems... 1/5