Manfred Opper
Manfred Opper is a machine-learning researcher whose work connects statistical physics with Bayesian inference and learning. In 1999 and 2000, he and Ole Winther develop Bayesian online learning, mean-field Gaussian-process classification, and a leave-one-out estimate of support vector machine generalization error. He co-edits Advanced Mean Field Methods: Theory and Practice in 2001 and develops expectation-consistent approximate inference in 2005. After a Reader post at Southampton, he accepts TU Berlin's call in artificial intelligence in 2006. As of October 2026, he is Professor Emeritus at TU Berlin and an ELLIS Fellow; his work includes stochastic control for Bayesian neural networks and inference for heterogeneous particle models.
Years link to their sources.
Timeline
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1992
A German physics award
In 1992, he receives the Physics Award of the German Physical Society.
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1999
Bayesian online learning
In 1999, he and Ole Winther present an online Bayesian algorithm that updates an approximate posterior as each example arrives. A Gaussian posterior family gives the algorithm asymptotic efficiency and supports learning in single-layer neural networks.
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2000
Gaussian processes and SVMs
In 2000, he and Ole Winther present a mean-field method for Gaussian-process classification and a leave-one-out estimate of support vector machine generalization error.
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2001
An edited mean-field book
He co-edits Advanced Mean Field Methods: Theory and Practice with David Saad in 2001; the book connects statistical-physics methods with approximate computation in probabilistic models.
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2005
Expectation-consistent inference
With Ole Winther, he proposes expectation-consistent approximate inference for intractable probabilistic models in 2005, using a free-energy formulation and Gaussian approximations that retain correlations.
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2005–2006
A call to Berlin for AI
In 2006, he accepts TU Berlin's call for its artificial-intelligence field after serving as a Reader at Southampton's School of Electronics and Computer Science.
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2022
Stochastic control for Bayesian neural networks
In 2022, he coauthors Stochastic Control for Bayesian Neural Network Training with Ludwig Winkler and César Ojeda.
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As of October 2026
Emeritus at TU Berlin
As of October 2026, he is Professor Emeritus at TU Berlin and an ELLIS Fellow. In 2026, he coauthors a Communications Physics paper that estimates population heterogeneity in motile-particle trajectories with a likelihood approximation for second-order Langevin models.
Career
- Since 2006Technische Universität BerlinProfessor of Artificial Intelligence
- Until 2006University of SouthamptonReader
Sources and credits
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- Prof. Dr. Manfred Opper
- A Bayesian approach to on-line learning — Aston Research Explorer
- Gaussian processes and SVM: Mean field results and leave-one-out — Aston Research Explorer
- Advanced mean field methods: theory and practice — Aston Research Explorer
- Expectation Consistent Approximate Inference
- Personalia der TU Berlin
- Honorary Colloquium for Manfred Opper
- Manfred Opper — ELLIS
- A Likelihood Approach for Inference of Population Heterogeneity in Particle Ensembles with Second-Order Langevin Dynamics



