Tootfinder

Homomorphism Calculus for User-Defined Aggregations
Ziteng Wang, Ruijie Fang, Linus Zheng, Dixin Tang, Isil Dillig
https://arxiv.org/abs/2508.15109 https://

Homomorphism Calculus for User-Defined Aggregations
Data processing frameworks like Apache Spark and Flink provide built-in support for user-defined aggregation functions (UDAFs), enabling the integration of domain-specific logic. However, for these frameworks to support \emph{efficient} UDAF execution, the function needs to satisfy a \emph{homomorphism property}, which ensures that partial results from independent computations can be merged correctly. Motivated by this problem, this paper introduces a novel \emph{homomorphism calculus} that can…

Ravens bench Cooper Rush for Tyler Huntley vs. Rams as team tries to find spark until Lamar Jackson returns

https://www.cbssports.com/nfl/news/ravens-bench-cooper-rush-t…

Cowboys fans on Twitter react to roster cuts, opinions sway on Vaughn, defensive depth https://cowboyswire.usatoday.com/story/sports/nfl/cowboys/2025/08/27/cowboys-roster-cuts-spark-strong-fan-reac…

What a goal! Difficult header to finish, leaning backwards to get the connection right. But Russo delivers and places it perfectly back to the near post.
Kelly, yet again, shows she can be the spark England need. Creative and calm.
Game on!
#engesp #EURO2025

SPARK: Synergistic Policy And Reward Co-Evolving Framework
Ziyu Liu, Yuhang Zang, Shengyuan Ding, Yuhang Cao, Xiaoyi Dong, Haodong Duan, Dahua Lin, Jiaqi Wang
https://arxiv.org/abs/2509.22624

SPARK: Synergistic Policy And Reward Co-Evolving Framework
Recent Large Language Models (LLMs) and Large Vision-Language Models (LVLMs) increasingly use Reinforcement Learning (RL) for post-pretraining, such as RL with Verifiable Rewards (RLVR) for objective tasks and RL from Human Feedback (RLHF) for subjective tasks. However, RLHF incurs high costs and potential reward-policy mismatch due to reliance on human preferences, while RLVR still wastes supervision by discarding rollouts and correctness signals after each update. To address these challenges,…

She might be the world's best receiver: Meet Isabella Geraci, U.S. flag football star https://www.nytimes.com/athletic/6554291/2025/08/15/isabella-geraci-team-usa-flag-football-wide-receiver/

Crustal Quakes Spark Magnetospheric Blasts: Imprints of Realistic Magnetar Crust Oscillations on the Fast Radio Burst Signal
Louis Burnaz, Elias R. Most, Ashley Bransgrove
https://arxiv.org/abs/2508.18033

Crustal Quakes Spark Magnetospheric Blasts: Imprints of Realistic Magnetar Crust Oscillations on the Fast Radio Burst Signal
Many transients believed to originate from magnetars are thought to be triggered by crustal activity, which feeds back on the surrounding magnetosphere. These perturbations, through a variety of proposed mechanisms, can convert a fraction of the magnetic energy stored in the magnetosphere, as well as the energy injected by crustal activity itself into electromagnetic emission, including X-ray bursts and fast radio bursts. Here we provide a first glimpse of this process by coupling magneto-elast…