Pe'er Lab — Representation & Geometric Learning

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Representation & Geometric Learning

Machine-learning methods built on non-Euclidean and other advanced representations — hyperbolic and mixed-curvature geometry, phylogenetics, and representation learning — applied to genomics and biological data.

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Non-Euclidean & mixed-curvature learning

Many biological systems have structure that flat, Euclidean representations capture poorly — hierarchies, branches, cycles, and curved manifolds. The lab builds interpretable machine-learning methods that operate natively in curved spaces.

Highlighted work includes, for instance, decision trees and random forests in hyperbolic space — made fast by avoiding Riemannian optimization — and their generalization to mixed-curvature product manifolds; an open-source library (Manify) for non-Euclidean representation learning; and applications such as hyperbolic genome embeddings.

Chlenski P, Turok E, Moretti A, Pe'er I · ICLR 2024 · arXiv:2310.13841
Extends decision trees to hyperbolic space using inner products, avoiding costly Riemannian optimization.
Chlenski P, Chu Q, Khan RR, Du K, Moretti AK, Pe'er I · ICML 2025 · arXiv:2410.13879
Generalizes decision trees and random forests to product manifolds of hyperbolic, spherical, and Euclidean factors.
Chlenski P, Pe'er I · arXiv:2506.04360 (2025)
Speeds up hyperbolic random forests via a Beltrami–Klein wrapper around standard Euclidean learners.
Chlenski P, Du K, Satow D, Khan RR, Pe'er I · arXiv:2503.09576 (2025)
An open-source Python library for learning and analyzing data in non-Euclidean (product-manifold) spaces.
Khan R, Chlenski P, Pe'er I · ICLR 2025, 73425–73454
Shows hyperbolic inductive biases improve genome-sequence representations on interpretation benchmarks.
Bayesian phylogenetics in hyperbolic space

Evolutionary relationships are naturally tree-like, and hyperbolic geometry embeds trees with low distortion. We develop Bayesian phylogenetic inference that operates directly in this space.

Chen A, Chlenski P, Munyuza K, Moretti AK, Naesseth CA, Pe'er I · arXiv:2501.17965 (2025)
Bayesian phylogenetic inference in hyperbolic space via variational combinatorial sequential Monte Carlo.
Representation learning for biological data

Beyond geometry, the lab develops representation-learning methods tailored to biological tasks — for instance, prefix-structured (Matryoshka) embeddings and contrastive objectives for differential splicing.

Talukder A, Chlenski P, Pe'er I · ICML 2026 (oral) · arXiv:2605.09160
Learns Matryoshka-style embeddings whose prefixes act as objective-specific privileged bases.
Talukder A, Keung N, Pe'er I, Knowles DA · RECOMB 2026 · bioRxiv 2026.02.20.707118
Contrastive learning with orthologous positive pairs for differential-splicing detection.