Tootfinder

Rethinking Group Recommender Systems in the Era of Generative AI: From One-Shot Recommendations to Agentic Group Decision Support
Dietmar Jannach, Amra Deli\'c, Francesco Ricci, Markus Zanker
https://arxiv.org/abs/2507.00535

Rethinking Group Recommender Systems in the Era of Generative AI: From One-Shot Recommendations to Agentic Group Decision Support
More than twenty-five years ago, first ideas were developed on how to design a system that can provide recommendations to groups of users instead of individual users. Since then, a rich variety of algorithmic proposals were published, e.g., on how to acquire individual preferences, how to aggregate them, and how to generate recommendations for groups of users. However, despite the rich literature on the topic, barely any examples of real-world group recommender systems can be found. This lets u…

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Palestine Action / UK censorship
Good article from @….
"While the groups actions may constitute criminal damage, their actions do not represent an attempt to induce fear in the population by creating an imminent threat to life. ...
"Proscribing Palestine Action as terrorists is not about public safety – it is about suppressing protest that we may disagree or agree with, but that stands well short of being an attempt to strike fear into the British public through the use of indiscriminate violence against people. In equating support of damage to military property with support of terrorism, it endangers legitimate debate about the UK-Israel arms trade. ...
"As there is no public evidence of any link to terrorism or support of terrorist groups from Palestine Action, Open Rights Group supports their decision to appeal proscription. While we may have differing opinions on their tactics, we stand against this attack on their right to exist and speak out."
#PalestineAction #UK #censorship #UKPol

Automorphisms of graphs of groups with cyclic edge groups
Dario Ascari, Montserrat Casals-Ruiz, Ilya Kazachkov
https://arxiv.org/abs/2507.16489 https://arx…

Automorphisms of graphs of groups with cyclic edge groups
We describe the outer automorphism group of a one-ended fundamental group of a graph of groups, when edge groups are cyclic, and vertex groups are torsion-free with cyclic centralizers. We show that in this case the outer automorphism group is virtually built from the outer automorphisms of the vertex groups (fixing some elements), the outer automorphisms of some associated generalized Baumslag-Solitar groups, and generalized twists - partial conjugations by elements in the centralizers of some…

Advancing Standard Load Profiles with Data-Driven Techniques and Recent Datasets
Jawana Gabrielski, Ulf H\"ager
https://arxiv.org/abs/2507.23401 https://

Advancing Standard Load Profiles with Data-Driven Techniques and Recent Datasets
Estimating electricity consumption accurately is essential for the planning and operation of energy systems, as well as for billing processes. Standard Load Profiles (SLP) are widely used to estimate consumption patterns of different user groups. However, in Germany these SLP were formulated using historical data from over 20 years ago and have not been adjusted since. Changing electricity consumption behaviour, which leads to increasing deviations between load patterns and SLP, results in a ne…

Friends Don't Let Friends Make Bad Graphs! Do you agree with the examples of bad graphs and the alternatives Chenxin Li (@chenxinli2.bsky.social) lists at https://github.com/cxli233/FriendsDontLetFriends

GitHub - cxli233/FriendsDontLetFriends: Friends don't let friends make certain types of data visualization - What are they and why are they bad.
Friends don't let friends make certain types of data visualization - What are they and why are they bad. - GitHub - cxli233/FriendsDontLetFriends: Friends don't let friends make certain ty...

PyG 2.0: Scalable Learning on Real World Graphs
Matthias Fey, Jinu Sunil, Akihiro Nitta, Rishi Puri, Manan Shah, Bla\v{z} Stojanovi\v{c}, Ramona Bendias, Alexandria Barghi, Vid Kocijan, Zecheng Zhang, Xinwei He, Jan Eric Lenssen, Jure Leskovec
https://arxiv.org/abs/2507.16991

PyG 2.0: Scalable Learning on Real World Graphs
PyG (PyTorch Geometric) has evolved significantly since its initial release, establishing itself as a leading framework for Graph Neural Networks. In this paper, we present Pyg 2.0 (and its subsequent minor versions), a comprehensive update that introduces substantial improvements in scalability and real-world application capabilities. We detail the framework's enhanced architecture, including support for heterogeneous and temporal graphs, scalable feature/graph stores, and various optimization…

I know that one of these days I am going to cave in and agree to pay the Grauniad £3 a month to read their site, but the amount of money I have to pay for media is not large and it mainly goes to small indy podcasts by individuals or small groups. I do have a sub to @…, which is corporate media, but that's the only exception.
There are so many rea…

Minimal-order groups with an irreducible character of degree $p$ or $p^2$
Asier Arranz
https://arxiv.org/abs/2507.19571 https://arxiv.org/pdf/2507.19571

Minimal-order groups with an irreducible character of degree $p$ or $p^2$
We characterize the finite groups of minimal order that admit an irreducible complex character of degree $p$ or $p^2$, where $p$ is a prime.

On the isomorphism problem for cyclic JSJ decompositions: vertex elimination
Dario Ascari, Montserrat Casals-Ruiz, Ilya Kazachkov
https://arxiv.org/abs/2507.16482 https://

On the isomorphism problem for cyclic JSJ decompositions: vertex elimination
We introduce two new moves on graphs of groups with cyclic edge groups that preserve the fundamental group. These moves allow us to address the isomorphism problem without the use of expansions, therefore keeping the number of vertices and edges constant along sequences of moves witnessing an isomorphism between two groups. We further show that the isomorphism problem for a large family of cyclic JSJ decompositions reduces to the case of generalized Baumslag-Solitar groups (GBS), and that among…