Search Results for author: Robert Tjarko Lange

Found 13 papers, 9 papers with code

Evolution Transformer: In-Context Evolutionary Optimization

1 code implementation5 Mar 2024 Robert Tjarko Lange, Yingtao Tian, Yujin Tang

Given a trajectory of evaluations and search distribution statistics, Evolution Transformer outputs a performance-improving update to the search distribution.

Large Language Models As Evolution Strategies

no code implementations28 Feb 2024 Robert Tjarko Lange, Yingtao Tian, Yujin Tang

Large Transformer models are capable of implementing a plethora of so-called in-context learning algorithms.

In-Context Learning

Discovering Temporally-Aware Reinforcement Learning Algorithms

1 code implementation8 Feb 2024 Matthew Thomas Jackson, Chris Lu, Louis Kirsch, Robert Tjarko Lange, Shimon Whiteson, Jakob Nicolaus Foerster

We propose a simple augmentation to two existing objective discovery approaches that allows the discovered algorithm to dynamically update its objective function throughout the agent's training procedure, resulting in expressive schedules and increased generalization across different training horizons.

Meta-Learning reinforcement-learning

NeuroEvoBench: Benchmarking Evolutionary Optimizers for Deep Learning Applications

1 code implementation NeurIPS 2023 Robert Tjarko Lange, Yujin Tang, Yingtao Tian

Recently, the Deep Learning community has become interested in evolutionary optimization (EO) as a means to address hard optimization problems, e. g. meta-learning through long inner loop unrolls or optimizing non-differentiable operators.

Benchmarking Meta-Learning

Lottery Tickets in Evolutionary Optimization: On Sparse Backpropagation-Free Trainability

1 code implementation31 May 2023 Robert Tjarko Lange, Henning Sprekeler

Is the lottery ticket phenomenon an idiosyncrasy of gradient-based training or does it generalize to evolutionary optimization?

Inductive Bias Linear Mode Connectivity +1

Discovering Attention-Based Genetic Algorithms via Meta-Black-Box Optimization

1 code implementation8 Apr 2023 Robert Tjarko Lange, Tom Schaul, Yutian Chen, Chris Lu, Tom Zahavy, Valentin Dalibard, Sebastian Flennerhag

Genetic algorithms constitute a family of black-box optimization algorithms, which take inspiration from the principles of biological evolution.

evosax: JAX-based Evolution Strategies

2 code implementations8 Dec 2022 Robert Tjarko Lange

In order to better harness these resources and to enable the next generation of black-box optimization algorithms, we release evosax: A JAX-based library of evolution strategies which allows researchers to leverage powerful function transformations such as just-in-time compilation, automatic vectorization and hardware parallelization.

Scheduling

Learning Not to Learn: Nature versus Nurture in Silico

no code implementations9 Oct 2020 Robert Tjarko Lange, Henning Sprekeler

Animals are equipped with a rich innate repertoire of sensory, behavioral and motor skills, which allows them to interact with the world immediately after birth.

Bayesian Inference Meta-Learning

Semantic RL with Action Grammars: Data-Efficient Learning of Hierarchical Task Abstractions

1 code implementation29 Jul 2019 Robert Tjarko Lange, Aldo Faisal

By treating an on-policy trajectory as a sentence sampled from the policy-conditioned language of the environment, we identify hierarchical constituents with the help of unsupervised grammatical inference.

Hierarchical Reinforcement Learning Logical Reasoning +3

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