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Leon Hetzel

6 accepted papers

2025

Enforcing Latent Euclidean Geometry in Single-Cell VAEs for Manifold Interpolation

ICML 2025spotlight

Latent space interpolations are a powerful tool for navigating deep generative models in applied settings. An example is single-cell RNA sequencing, where existing methods model cellular state transitions as latent space interpolations with variational autoencoders, often assuming linear shifts and…

Cited by 0SourcePDFScholar
2025

MAGNet: Motif-Agnostic Generation of Molecules from Scaffolds

ICLR 2025spotlight

Recent advances in machine learning for molecules exhibit great potential for facilitating drug discovery from in silico predictions. Most models for molecule generation rely on the decomposition of molecules into frequently occurring substructures (motifs), from which they generate novel compounds.…

Cited by 0SourcePDFScholar
2024

Expressivity and Generalization: Fragment-Biases for Molecular GNNs

ICML 2024oral

Although recent advances in higher-order Graph Neural Networks (GNNs) improve the theoretical expressiveness and molecular property predictive performance, they often fall short of the empirical performance of models that explicitly use fragment information as inductive bias. However, for these appr…

Cited by 5SourcePDFScholar
2024

Unified Guidance for Geometry-Conditioned Molecular Generation

NeurIPS 2024poster

Effectively designing molecular geometries is essential to advancing pharmaceutical innovations, a domain, which has experienced great attention through the success of generative models and, in particular, diffusion models. However, current molecular diffusion models are tailored towards a specific…

Cited by 2SourcePDFScholar
2022

Predicting Cellular Responses to Novel Drug Perturbations at a Single-Cell Resolution

NeurIPS 2022accept

Single-cell transcriptomics enabled the study of cellular heterogeneity in response to perturbations at the resolution of individual cells. However, scaling high-throughput screens (HTSs) to measure cellular responses for many drugs remains a challenge due to technical limitations and, more importan…

2019

Interpretable and Fine-Grained Visual Explanations for Convolutional Neural Networks

CVPR 2019poster

To verify and validate networks, it is essential to gain insight into their decisions, limitations as well as possible shortcomings of training data. In this work, we propose a post-hoc, optimization based visual explanation method, which highlights the evidence in the input image for a specific pre…

Cited by 186PDFScholar