Georgios Panayiotou
@giorgospanay.bsky.social
Computer science doctorand at Uppsala University, @uuinfolab.bsky.social.
Mining social networks, discovering new music, occasionally playing baseball and softball.
Probably not George Michael, but search engines believe otherwise.
Mining social networks, discovering new music, occasionally playing baseball and softball.
Probably not George Michael, but search engines believe otherwise.
Pinned
Anatomy of a Swedish population-scale network - Scientific Reports
Scientific Reports - Anatomy of a Swedish population-scale network
doi.org
🧮 ~8M nodes, 330M relationships across family, household, school & work.
🇸🇪 We constructed a multilayer population-scale network for Sweden, capturing distinct features of the country.
📝 doi.org/10.1038/s415...
cc: @ingakwoh.bsky.social @matmagnani.bsky.social ++
🇸🇪 We constructed a multilayer population-scale network for Sweden, capturing distinct features of the country.
📝 doi.org/10.1038/s415...
cc: @ingakwoh.bsky.social @matmagnani.bsky.social ++
Reposted by Georgios Panayiotou
We welcome @anmen.bsky.social as a new postdoctoral researcher at Uppsala University, Dept. of Information Technology, and as a new member of the InfoLab.
November 14, 2025 at 10:47 AM
We welcome @anmen.bsky.social as a new postdoctoral researcher at Uppsala University, Dept. of Information Technology, and as a new member of the InfoLab.
Reposted by Georgios Panayiotou
New paper in Science Advances:
“Intersectional inequalities in social ties”
🔗 www.science.org/doi/10.1126/...
A quantitative framework to measure how inequalities emerge in social networks when multiple identities intersect.
#SocialNetworks #Inequality #Intersectionality #ComplexSystems
“Intersectional inequalities in social ties”
🔗 www.science.org/doi/10.1126/...
A quantitative framework to measure how inequalities emerge in social networks when multiple identities intersect.
#SocialNetworks #Inequality #Intersectionality #ComplexSystems
Intersectional inequalities in social ties
At identity intersections, inequality transforms, revealing network patterns that single-dimensional models fail to explain.
www.science.org
November 10, 2025 at 8:28 AM
New paper in Science Advances:
“Intersectional inequalities in social ties”
🔗 www.science.org/doi/10.1126/...
A quantitative framework to measure how inequalities emerge in social networks when multiple identities intersect.
#SocialNetworks #Inequality #Intersectionality #ComplexSystems
“Intersectional inequalities in social ties”
🔗 www.science.org/doi/10.1126/...
A quantitative framework to measure how inequalities emerge in social networks when multiple identities intersect.
#SocialNetworks #Inequality #Intersectionality #ComplexSystems
Reposted by Georgios Panayiotou
Congratulations to our @dvladek.bsky.social for being appointed Docent in Computer Science!
November 6, 2025 at 8:45 AM
Congratulations to our @dvladek.bsky.social for being appointed Docent in Computer Science!
Reposted by Georgios Panayiotou
How fair are the algorithms that decide who gets information online? Our new paper in PNAS Nexus shows that maximization algorithms, the ones used to pick “influencers” in social networks, unintentionally deepen inequality.
🧠 Sekara, Dotu, Cebrian, Moro & García-Herranz
🔗 doi.org/10.1093/pnas...
🧠 Sekara, Dotu, Cebrian, Moro & García-Herranz
🔗 doi.org/10.1093/pnas...
Detecting bias in algorithms used to disseminate information in social networks and mitigating it using multiobjective optimization
Abstract. Social connections are conduits through which individuals communicate, information propagates, and diseases spread. Identifying individuals who a
doi.org
October 31, 2025 at 1:39 PM
How fair are the algorithms that decide who gets information online? Our new paper in PNAS Nexus shows that maximization algorithms, the ones used to pick “influencers” in social networks, unintentionally deepen inequality.
🧠 Sekara, Dotu, Cebrian, Moro & García-Herranz
🔗 doi.org/10.1093/pnas...
🧠 Sekara, Dotu, Cebrian, Moro & García-Herranz
🔗 doi.org/10.1093/pnas...
Reposted by Georgios Panayiotou
MOUFLON: Multi-group Modularity-based Fairness-aware Community Detection
https://arxiv.org/abs/2510.12348
In this paper, we propose MOUFLON, a fairness-aware, modularity-based community detection method that allows adjusting the importance of partition quality over fairness outcomes. MOUFLON ...📈🤖
https://arxiv.org/abs/2510.12348
In this paper, we propose MOUFLON, a fairness-aware, modularity-based community detection method that allows adjusting the importance of partition quality over fairness outcomes. MOUFLON ...📈🤖
October 15, 2025 at 4:42 PM
MOUFLON: Multi-group Modularity-based Fairness-aware Community Detection
https://arxiv.org/abs/2510.12348
In this paper, we propose MOUFLON, a fairness-aware, modularity-based community detection method that allows adjusting the importance of partition quality over fairness outcomes. MOUFLON ...📈🤖
https://arxiv.org/abs/2510.12348
In this paper, we propose MOUFLON, a fairness-aware, modularity-based community detection method that allows adjusting the importance of partition quality over fairness outcomes. MOUFLON ...📈🤖
In Zurich today for the Ethics in Complex Systems Workshop
October 9, 2025 at 7:24 AM
In Zurich today for the Ethics in Complex Systems Workshop
My friends after watching this: "is this your PhD?"
Network Science, and three of its avengers, featured in the latest @veritasium.bsky.social video (one of the largest youtube channels for Science education)!! youtu.be/CYlon2tvywA?... @stevenstrogatz.com Duncan Watts @barabasi.bsky.social
Something Strange Happens When You Trace How Connected We Are
YouTube video by Veritasium
youtu.be
October 2, 2025 at 8:02 AM
My friends after watching this: "is this your PhD?"
Reposted by Georgios Panayiotou
Want to promote transparency and clarity in network research by helping develop 𝐆𝐮𝐢𝐝𝐞𝐥𝐢𝐧𝐞𝐬 𝐟𝐨𝐫 𝐑𝐞𝐩𝐨𝐫𝐭𝐢𝐧𝐠 𝐀𝐛𝐨𝐮𝐭 𝐍𝐞𝐭𝐰𝐨𝐫𝐤 𝐃𝐚𝐭𝐚 (𝐆𝐑𝐀𝐍𝐃)?
Sign up to get involved here: tinyurl.com/help-with-GR...
▪️ All career stages welcome
▪️ All fields welcome
▪️ Be compensated for your time
Sign up to get involved here: tinyurl.com/help-with-GR...
▪️ All career stages welcome
▪️ All fields welcome
▪️ Be compensated for your time
GRAND Recruitment
Complete this short questionnaire to help develop Guidelines for Reporting About Network Data (GRAND).
tinyurl.com
October 1, 2025 at 12:21 PM
Want to promote transparency and clarity in network research by helping develop 𝐆𝐮𝐢𝐝𝐞𝐥𝐢𝐧𝐞𝐬 𝐟𝐨𝐫 𝐑𝐞𝐩𝐨𝐫𝐭𝐢𝐧𝐠 𝐀𝐛𝐨𝐮𝐭 𝐍𝐞𝐭𝐰𝐨𝐫𝐤 𝐃𝐚𝐭𝐚 (𝐆𝐑𝐀𝐍𝐃)?
Sign up to get involved here: tinyurl.com/help-with-GR...
▪️ All career stages welcome
▪️ All fields welcome
▪️ Be compensated for your time
Sign up to get involved here: tinyurl.com/help-with-GR...
▪️ All career stages welcome
▪️ All fields welcome
▪️ Be compensated for your time
Reposted by Georgios Panayiotou
🚨 New paper out! 🚨
🔗 arxiv.org/abs/2509.21092
[read comments for more!]
Special thanks to my co-authors @dvladek.bsky.social and Alessio Gandelli from @uuinfolab.bsky.social !
#ComputationalSocialScience #OnlineSocialNetworks
@arxiv-cs-si.bsky.social
🔗 arxiv.org/abs/2509.21092
[read comments for more!]
Special thanks to my co-authors @dvladek.bsky.social and Alessio Gandelli from @uuinfolab.bsky.social !
#ComputationalSocialScience #OnlineSocialNetworks
@arxiv-cs-si.bsky.social
Influence of the majority group on individual judgments in online spontaneous conversations
This study investigates how the majority group influences individual judgment formation and expression in anonymous, spontaneous online conversations. Drawing on theories of social conformity and anti...
arxiv.org
September 26, 2025 at 9:37 AM
🚨 New paper out! 🚨
🔗 arxiv.org/abs/2509.21092
[read comments for more!]
Special thanks to my co-authors @dvladek.bsky.social and Alessio Gandelli from @uuinfolab.bsky.social !
#ComputationalSocialScience #OnlineSocialNetworks
@arxiv-cs-si.bsky.social
🔗 arxiv.org/abs/2509.21092
[read comments for more!]
Special thanks to my co-authors @dvladek.bsky.social and Alessio Gandelli from @uuinfolab.bsky.social !
#ComputationalSocialScience #OnlineSocialNetworks
@arxiv-cs-si.bsky.social
Reposted by Georgios Panayiotou
Nearly twenty years after the first igraph release, igraph 1.0 has finally arrived! 🎉 This release focuses on providing a stable and more consistent interface that users and downstream maintainers can rely on with confidence. For more detail, see igraph.org/2025/09/20/i...
C/igraph 1.0.0
Nearly twenty years after the first igraph release, igraph 1.0 has finally arrived. This release focuses on providing a stable and more consistent interface that users and downstream maintainers can r...
igraph.org
September 21, 2025 at 9:36 AM
Nearly twenty years after the first igraph release, igraph 1.0 has finally arrived! 🎉 This release focuses on providing a stable and more consistent interface that users and downstream maintainers can rely on with confidence. For more detail, see igraph.org/2025/09/20/i...
Reposted by Georgios Panayiotou
Our new study provides the first large-scale look at how collective action is expressed in spoken digital discourse, using #BlackLivesMatter as a case study.
Many thanks to @ariannapera.bsky.social @dvladek.bsky.social @lajello.bsky.social for the collab
Check it out: arxiv.org/abs/2509.13197
Many thanks to @ariannapera.bsky.social @dvladek.bsky.social @lajello.bsky.social for the collab
Check it out: arxiv.org/abs/2509.13197
Podcasts as a Medium for Participation in Collective Action: A Case Study of Black Lives Matter
We study how participation in collective action is articulated in podcast discussions, using the Black Lives Matter (BLM) movement as a case study. While research on collective action discourse has pr...
arxiv.org
September 18, 2025 at 7:12 AM
Our new study provides the first large-scale look at how collective action is expressed in spoken digital discourse, using #BlackLivesMatter as a case study.
Many thanks to @ariannapera.bsky.social @dvladek.bsky.social @lajello.bsky.social for the collab
Check it out: arxiv.org/abs/2509.13197
Many thanks to @ariannapera.bsky.social @dvladek.bsky.social @lajello.bsky.social for the collab
Check it out: arxiv.org/abs/2509.13197
Reposted by Georgios Panayiotou
I will not stop using my em dashes out of fear of a reviewer accusing me of using AI!
September 11, 2025 at 1:16 PM
I will not stop using my em dashes out of fear of a reviewer accusing me of using AI!
Reposted by Georgios Panayiotou
📢Take a breath, you have extra days to finish!
Due to technical issues with @openreviewnet this week, we’ve extended all deadlines by 2 weeks.
🗓️New deadline for abstracts: Sept 19, 23:59 AoE
📷 More info: netscix2026.github.io
@MLuczak @ProfMSmall @droneale @danielapaolotti
Due to technical issues with @openreviewnet this week, we’ve extended all deadlines by 2 weeks.
🗓️New deadline for abstracts: Sept 19, 23:59 AoE
📷 More info: netscix2026.github.io
@MLuczak @ProfMSmall @droneale @danielapaolotti
September 4, 2025 at 11:53 PM
📢Take a breath, you have extra days to finish!
Due to technical issues with @openreviewnet this week, we’ve extended all deadlines by 2 weeks.
🗓️New deadline for abstracts: Sept 19, 23:59 AoE
📷 More info: netscix2026.github.io
@MLuczak @ProfMSmall @droneale @danielapaolotti
Due to technical issues with @openreviewnet this week, we’ve extended all deadlines by 2 weeks.
🗓️New deadline for abstracts: Sept 19, 23:59 AoE
📷 More info: netscix2026.github.io
@MLuczak @ProfMSmall @droneale @danielapaolotti
Reposted by Georgios Panayiotou
Reposted by Georgios Panayiotou
Population-Scale Network Embeddings Expose Educational Divides in Network Structure Related to Right-Wing Populist Voting
https://arxiv.org/abs/2508.21236
Administrative registry data can be used to construct population-scale networks whose ties reflect shared social contexts between persons....📈🤖
https://arxiv.org/abs/2508.21236
Administrative registry data can be used to construct population-scale networks whose ties reflect shared social contexts between persons....📈🤖
September 1, 2025 at 4:21 PM
Population-Scale Network Embeddings Expose Educational Divides in Network Structure Related to Right-Wing Populist Voting
https://arxiv.org/abs/2508.21236
Administrative registry data can be used to construct population-scale networks whose ties reflect shared social contexts between persons....📈🤖
https://arxiv.org/abs/2508.21236
Administrative registry data can be used to construct population-scale networks whose ties reflect shared social contexts between persons....📈🤖
Reposted by Georgios Panayiotou
Final year PhD students, I know you’re desperately trying to finish experiments/revisions/submissions/write a thesis & just survive - but please spare a few minutes to apply to your dream postdoc labs.
It easily takes A YEAR from first contact, even if everything goes to plan on both sides.
It easily takes A YEAR from first contact, even if everything goes to plan on both sides.
August 27, 2025 at 9:35 AM
Final year PhD students, I know you’re desperately trying to finish experiments/revisions/submissions/write a thesis & just survive - but please spare a few minutes to apply to your dream postdoc labs.
It easily takes A YEAR from first contact, even if everything goes to plan on both sides.
It easily takes A YEAR from first contact, even if everything goes to plan on both sides.
Reposted by Georgios Panayiotou
Our article on population-scale networks of social opportunities constructed from administrative data is now available online: www.nature.com/articles/s41....
August 24, 2025 at 5:41 PM
Our article on population-scale networks of social opportunities constructed from administrative data is now available online: www.nature.com/articles/s41....
🧮 ~8M nodes, 330M relationships across family, household, school & work.
🇸🇪 We constructed a multilayer population-scale network for Sweden, capturing distinct features of the country.
📝 doi.org/10.1038/s415...
cc: @ingakwoh.bsky.social @matmagnani.bsky.social ++
🇸🇪 We constructed a multilayer population-scale network for Sweden, capturing distinct features of the country.
📝 doi.org/10.1038/s415...
cc: @ingakwoh.bsky.social @matmagnani.bsky.social ++
Anatomy of a Swedish population-scale network - Scientific Reports
Scientific Reports - Anatomy of a Swedish population-scale network
doi.org
August 23, 2025 at 3:59 PM
🧮 ~8M nodes, 330M relationships across family, household, school & work.
🇸🇪 We constructed a multilayer population-scale network for Sweden, capturing distinct features of the country.
📝 doi.org/10.1038/s415...
cc: @ingakwoh.bsky.social @matmagnani.bsky.social ++
🇸🇪 We constructed a multilayer population-scale network for Sweden, capturing distinct features of the country.
📝 doi.org/10.1038/s415...
cc: @ingakwoh.bsky.social @matmagnani.bsky.social ++
Reposted by Georgios Panayiotou
Καλημέρα!
Καλό Δεκαπενταύγουστο!
Καλό Δεκαπενταύγουστο!
August 15, 2025 at 5:11 AM
Καλημέρα!
Καλό Δεκαπενταύγουστο!
Καλό Δεκαπενταύγουστο!
Reposted by Georgios Panayiotou
"This is the first result to break the O(m+nlogn) time bound of Dijkstra's algorithm on sparse graphs, showing that Dijkstra's algorithm is not optimal for SSSP."
arxiv.org/abs/2504.17033
arxiv.org/abs/2504.17033
Breaking the Sorting Barrier for Directed Single-Source Shortest Paths
We give a deterministic $O(m\log^{2/3}n)$-time algorithm for single-source shortest paths (SSSP) on directed graphs with real non-negative edge weights in the comparison-addition model. This is the fi...
arxiv.org
August 13, 2025 at 10:00 PM
"This is the first result to break the O(m+nlogn) time bound of Dijkstra's algorithm on sparse graphs, showing that Dijkstra's algorithm is not optimal for SSSP."
arxiv.org/abs/2504.17033
arxiv.org/abs/2504.17033
Reposted by Georgios Panayiotou
Catching up on emails after week away from office really highlights just how many predatory journal invites I receive (even though I routinely block them).
#academicsky
#academicsky
elmo from sesame street sitting at a table with a purple cup and straw
ALT: elmo from sesame street sitting at a table with a purple cup and straw
media.tenor.com
August 13, 2025 at 12:52 AM
Catching up on emails after week away from office really highlights just how many predatory journal invites I receive (even though I routinely block them).
#academicsky
#academicsky
Summer CV-worthy math project (finishing balatro) complete. Now to finally update my website
August 11, 2025 at 9:26 AM
Summer CV-worthy math project (finishing balatro) complete. Now to finally update my website
Reposted by Georgios Panayiotou
So glad for the support I received🙏🏻 I met so many interesting people, had fruitful discussions and so much fun!
Special thank to my supervisors @dvladek.bsky.social @calikus.bsky.social , to my amazing colleagues @uuinfolab.bsky.social and … [comments]
Special thank to my supervisors @dvladek.bsky.social @calikus.bsky.social , to my amazing colleagues @uuinfolab.bsky.social and … [comments]
July 24, 2025 at 6:06 PM
So glad for the support I received🙏🏻 I met so many interesting people, had fruitful discussions and so much fun!
Special thank to my supervisors @dvladek.bsky.social @calikus.bsky.social , to my amazing colleagues @uuinfolab.bsky.social and … [comments]
Special thank to my supervisors @dvladek.bsky.social @calikus.bsky.social , to my amazing colleagues @uuinfolab.bsky.social and … [comments]
Reposted by Georgios Panayiotou
It‘s a wrap!
Man, what an experience. I’m 150% exhausted, but 200% happy!
It was an honor hosting #IC2S2 2025 in Norrköping with phenomenal weather for so many lovely people! I can’t wait to see you all again!
Many thanks to all participants, keynote speakers, and helpers!
❤️
Man, what an experience. I’m 150% exhausted, but 200% happy!
It was an honor hosting #IC2S2 2025 in Norrköping with phenomenal weather for so many lovely people! I can’t wait to see you all again!
Many thanks to all participants, keynote speakers, and helpers!
❤️
July 24, 2025 at 5:13 PM
It‘s a wrap!
Man, what an experience. I’m 150% exhausted, but 200% happy!
It was an honor hosting #IC2S2 2025 in Norrköping with phenomenal weather for so many lovely people! I can’t wait to see you all again!
Many thanks to all participants, keynote speakers, and helpers!
❤️
Man, what an experience. I’m 150% exhausted, but 200% happy!
It was an honor hosting #IC2S2 2025 in Norrköping with phenomenal weather for so many lovely people! I can’t wait to see you all again!
Many thanks to all participants, keynote speakers, and helpers!
❤️
Reposted by Georgios Panayiotou
Happy to be part of this work and seeing it being presented here in Sweden!
No better place than a Swedish #ic2s2 to present our population-scale network of Sweden! 🇸🇪
Very grateful to discuss ideas and challenges with colleagues (future collaborators?) working with similar data.
You can find our preprint here: doi.org/10.31235/osf...
Very grateful to discuss ideas and challenges with colleagues (future collaborators?) working with similar data.
You can find our preprint here: doi.org/10.31235/osf...
July 24, 2025 at 6:06 PM
Happy to be part of this work and seeing it being presented here in Sweden!