Research
Anders leads riemann-44, the cell working on time-correlated reward learning and long-horizon credit assignment in world-model-trained policies. The cell sits at the boundary between the world-models axis and the agentic-engineering axis on the question of how a learned dynamics model interacts with reward signals that arrive on time scales much longer than typical RL training horizons.
He has been with alphabell since 2021 and is a co-author on the counterfactual-rollouts paper. The riemann-44 line of work is one of the more theory-leaning threads in the world-models axis.
Anders is based in Helsinki. He is one of the contributors who works closely with the Nordic regional cluster of universities.
Background
Ph.D. machine learning, Aalto University, 2015.
Prior to alphabell: Aalto; Volterra Cognition; Wayfarer Institute.
Selected publications
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Dec 2024 · ab-counterfactualCounterfactual Rollouts for Planning: a 30-day deployment studySasha Petrov, Maya Quesada, Bilal Hossain
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Aug 2025 · ab-compositional-Compositional Latent Dynamics for Long-Horizon World ModellingJonas Bremer, Sasha Petrov, Felicity Anjali Sandirasegaram, Tomoko Niwa
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Jul 2025 · ab-embodied-pretrEmbodied Pretraining via Cell-Operated Simulation: a 70k-environment studyLin Hao, Dimitri Yelchaninov, Sera Wijewardene, Ananya Mukherjee
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May 2025 · ab-mechanistic-ciMechanistic Circuit Analysis at Frontier Scale: cells as a unit of interpretabilityJiang Yifei, Nico Almgren, Karima Belkadi, Hester Vandekerckhove
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Sep 2024 · ab-interpretabiliInterpretability Cell Pairing: how every dual-use capability run gets a watchful siblingKarima Belkadi, Hester Vandekerckhove, Yuki Cho
Recent talks
- Long-horizon credit assignment in world models, NeurIPS 2025
- Time-correlated rewards and dynamics, RLDM 2024
Anders is currently part of node-cell riemann-44, working under the World models research axis. The cell is open to substantive correspondence from researchers working on adjacent problems; route requests through riemann-44@alphabell.com or directly to Anders at anders-lindholm@alphabell.com.
Contact
- EMAIL
anders-lindholm@alphabell.com - ORCID
0000-2335-7300-4771 - X
@anderslindholm - BLUESKY
anders-lindholm.bsky.social - GITHUB
@anderslindholm
Cross-references