The paper introduces a new learning objective called trajectory balance for Generative Flow Networks (GFlowNets), aiming to improve credit assignment across long action sequences. It demonstrates that minimizing this objective yields a policy that samples exactly from the target distribution. Experiments on four domains show that trajectory balance enhances convergence, sample diversity, and robustness to long sequences and large action spaces.
By Esmeralda S. Whitammer, Moksh Jain, Emmanuel Bengio, Chen Sun, Yoshua Bengio
arXiv:2610.19781v1 Announce Type: cross
Abstract: We introduce SNACK, a string representation for probabilistic graph generation that enables sequence models to generate and model graphs with discret...
By Hohyun Kim, Hyesung Kim, Min-hwan Oh, Seunggeun Lee
arXiv:2606. 15793v1 Announce Type: cross Abstract: This paper explores policy gradient algorithms for training stochastic policies to sample from structured discrete probability distributions under the Generative Flow Network (GFlowNet) framework.
By Anna Zykova-Myzina, Timofei Gritsaev, Daniil Tiapkin, Nikita Morozov
arXiv:2408. 05885v3 Announce Type: replace Abstract: Generative Flow Networks (GFlowNets) have been shown effective to generate combinatorial objects with desired properties.
By Puhua Niu, Shili Wu, Mingzhou Fan, Xiaoning Qian
arXiv:2605. 01729v2 Announce Type: replace Abstract: Generative Flow Networks (GFlowNets) learn to sample states proportional to an unnormalized reward.
By Zengxiang Lei, Ananth Shreekumar, Jonathan Rosenthal, Ruoyu Song, Alvaro A. Cardenas, Daniel J. Fremont, Dongyan Xu, Satish Ukkusuri, Z. Berkay Celik
Hierarchical Cooperative GFlowNets (HCG) dynamically partition the search space to coordinate multiple GFlowNets, preventing them from collapsing onto the same high‑reward regions. HCG imposes an ordering where the top model explores the full space while lower‑ranked models focus on uncovered areas, using a shared classifier and a normalizer‑weighted aggregation rule to maintain reward‑proportional sampling. Experiments on multimodal distributions, sequence generation, combinatorial optimization, and biological sequence design demonstrate that HCG improves mode coverage and target approximation, enabling broader complementary exploration.
By Pedro Dall'Antonia, Juan Belieni, Ana Carolina Erthal, Saullo H. G. de Oliveira, Eliezer de Souza da Silva, Diego Mesquita