Ax Veeti Ahvonen, Maurice Funk, Damian Heiman, Antti Kuusisto, Carsten Lutz 2/19/2026

Expressive Power of Graph Transformers via Logic

Theoretical analysis of graph transformers' expressive power using logic, covering both real numbers and floating-point settings.

Ax K. J. Kevin Feng (Jim), Tzu-Sheng Kuo (Jim), Quan Ze (Jim), Chen, Inyoung Cheong, Kenneth Holstein, Amy X. Zhang 2/19/2026

PolicyPad: Collaborative Prototyping of LLM Policies

PolicyPad system supporting collaborative policy design for LLMs in high-stakes domains via rapid prototyping and iteration.

Ax Lucas Bandarkar, Chenyuan Yang, Mohsen Fayyaz, Junlin Hu, Nanyun Peng 2/19/2026

Multilingual Routing in Mixture-of-Experts

Analysis of expert routing patterns in multilingual Mixture-of-Experts LLMs revealing language-specific dynamics across layers.

Ax Zhaoyi Joey Hou, Bowei Alvin Zhang, Yining Lu, Bhiman Kumar Baghel, Anneliese Brei, Ximing Lu, Meng Jiang, Faeze Brahman, Snigdha Chaturvedi, Haw-Shiuan Chang, Daniel Khashabi, Xiang Lorraine Li 2/19/2026

CreativityPrism: A Holistic Evaluation Framework for Large Language Model Creativity

CreativityPrism framework for holistic, scalable evaluation of LLM creativity across diverse scenarios without heavy human involvement.

Ax Prajit Bhaskaran, Tom Viering 2/19/2026

Transformers can do Bayesian Clustering

Cluster-PFN uses Transformers for unsupervised Bayesian clustering with uncertainty quantification, handling missing values.

Ax Dong-Shan Jian, Xiang Li, Chen-Xu Yan, Hui-Wen Zheng, Zhi-Zhang Bian, You-Le Fang, Ren-Xi He, Jing-Tian Zhang, Ce Meng, Ling-Shi Meng, Bing-Rui Gong, Sheng-Qi Zhang, Yan-Qing Ma 2/19/2026

Mastering Olympiad-Level Physics with Artificial Intelligence

LOCA framework enabling AI agents to solve Olympiad-level physics problems via logical chain decomposition and verification.

Ax Amir H. Ashouri, Shayan Shirahmad Gale Bagi, Kavin Satheeskumar, Tejas Srikanth, Jonathan Zhao, Ibrahim Saidoun, Ziwen Wang, Bryan Chan, Tomasz S. Czajkowski 2/19/2026

Protean Compiler: An Agile Framework to Drive Fine-grain Phase Ordering

Protean Compiler framework using machine learning to optimize compiler phase ordering, addressing long-standing optimization problem with agile fine-grain approach.

Ax Shubham Agarwal, Asim Biswal, Sepanta Zeighami, Alvin Cheung, Joseph Gonzalez, Aditya G. Parameswaran 2/19/2026

Arming Data Agents with Tribal Knowledge

Framework arming NL2SQL agents with database-specific tribal knowledge to improve translation accuracy on real-world databases.

Ax David Puertolas Merenciano, Ekaterina Vasyagina, Raghav Dixit, Kevin Zhu, Ruizhe Li, Javier Ferrando, Maheep Chaudhary 2/19/2026

Weight space Detection of Backdoors in LoRA Adapters

Weight-space detection method for backdoor attacks in LoRA adapters without requiring execution or knowing trigger patterns.