publications

2025

  1. aurora.png
    A foundation model for the Earth system
    Cristian Bodnar*, Wessel P Bruinsma*, Ana Lucic*, and 8 more authors
    Nature, 2025
    PDF

2023

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    On the Expressive Power of Geometric Graph Neural Networks
    Chaitanya K Joshi*, Cristian Bodnar*, Simon V Mathis, and 2 more authors
    In International Conference on Machine Learning, 2023
    arXiv Code

2022

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    Topological Deep Learning: Graphs, Complexes, Sheaves
    Cristian Bodnar
    PhD Thesis, University of Cambridge, 2022
    Website
  2. san.png
    Sheaf Attention Networks
    Federico Barbero, Cristian Bodnar, Haitz Sáez Ocáriz Borde, and 1 more author
    In NeurIPS 2022 Workshop on SymFmetry and Geometry in Neural Representations (Oral), 2022
    PDF
  3. sheaf_propagation.png
    Surfing on the Neural Sheaf
    Julian Suk*, Lorenzo Giusti*, Tamir Hemo*, and 3 more authors
    In NeurIPS 2022 Workshop on Symmetry and Geometry in Neural Representations, 2022
    PDF
  4. riemannian-diagram.png
    Sheaf Neural Networks with Connection Laplacians
    Federico Barbero, Cristian Bodnar, Haitz Sáez Ocáriz Borde, and 3 more authors
    In Topological, Algebraic and Geometric Learning Workshops, 2022
    arXiv
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    Neural Sheaf Diffusion: A Topological Perspective on Heterophily and Oversmoothing in GNNs
    Cristian Bodnar, Francesco Di Giovanni, Benjamin Paul Chamberlain, and 2 more authors
    In Advances in Neural Information Processing Systems, 2022
    arXiv Blog Code

2021

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    Weisfeiler and Lehman Go Cellular: CW Networks
    Cristian Bodnar*, Fabrizio Frasca*, Nina Otter, and 4 more authors
    Advances in Neural Information Processing Systems, 2021
    arXiv Blog Code
  2. mpsn.png
    Weisfeiler and Lehman Go Topological: Message Passing Simplicial Networks
    Cristian Bodnar*, Fabrizio Frasca*, Yuguang Wang*, and 4 more authors
    In International Conference on Machine Learning, 2021
    arXiv Blog Code
  3. ndp_exp.png
    Neural ODE Processes
    Alexander Norcliffe*, Cristian Bodnar*, Ben Day*, and 2 more authors
    In International Conference on Learning Representations, 2021
    arXiv Code
  4. dgm_viz.png
    Deep Graph Mapper: Seeing Graphs through the Neural Lens
    Cristian Bodnar*, Cătălina Cangea*, and Pietro Liò
    Frontiers in Big Data, 2021
    PDF
  5. metric_space_rl.png
    A metric space perspective on self-supervised policy adaptation
    Cristian Bodnar, Karol Hausman, Gabriel Dulac-Arnold, and 1 more author
    IEEE Robotics and Automation Letters, 2021
    PDF

2020

  1. sonode.gif
    On Second Order Behaviour in Augmented Neural ODEs
    Alexander Norcliffe, Cristian Bodnar, Ben Day, and 2 more authors
    Advances in Neural Information Processing Systems, 2020
    arXiv Code
  2. q2opt.gif
    Quantile QT-Opt for Risk-Aware Vision-Based Robotic Grasping
    Cristian Bodnar, Adrian Li, Karol Hausman, and 2 more authors
    In Robotics: Science and Systems (Best Systems Paper Finalist), 2020
    arXiv Website
  3. pderl.png
    Proximal distilled evolutionary reinforcement learning
    Cristian Bodnar, Ben Day, and Pietro Lió
    In Proceedings of the AAAI Conference on Artificial Intelligence, 2020
    arXiv Code
  4. isomorphism_classes.png
    The Role of Isomorphism Classes in Multi-Relational Datasets
    Vijja Wichitwechkarn*, Ben Day*, Cristian Bodnar*, and 2 more authors
    AAAI Workshop on Graphs and more Complex structures for Learning and Reasoning, 2020
    arXiv