Search Results for author: Angelika Steger

Found 13 papers, 4 papers with code

Learning Randomized Algorithms with Transformers

no code implementations20 Aug 2024 Johannes von Oswald, Seijin Kobayashi, Yassir Akram, Angelika Steger

Randomization is a powerful tool that endows algorithms with remarkable properties.

Gated recurrent neural networks discover attention

no code implementations4 Sep 2023 Nicolas Zucchet, Seijin Kobayashi, Yassir Akram, Johannes von Oswald, Maxime Larcher, Angelika Steger, João Sacramento

In particular, we examine RNNs trained to solve simple in-context learning tasks on which Transformers are known to excel and find that gradient descent instills in our RNNs the same attention-based in-context learning algorithm used by Transformers.

In-Context Learning

Random initialisations performing above chance and how to find them

1 code implementation15 Sep 2022 Frederik Benzing, Simon Schug, Robert Meier, Johannes von Oswald, Yassir Akram, Nicolas Zucchet, Laurence Aitchison, Angelika Steger

Neural networks trained with stochastic gradient descent (SGD) starting from different random initialisations typically find functionally very similar solutions, raising the question of whether there are meaningful differences between different SGD solutions.

Solving Static Permutation Mastermind using $O(n \log n)$ Queries

no code implementations3 Mar 2021 Maxime Larcher, Anders Martinsson, Angelika Steger

Permutation Mastermind is a version of the classical mastermind game in which the number of positions $n$ is equal to the number of colors $k$, and repetition of colors is not allowed, neither in the codeword nor in the queries.

Combinatorics Probability

Improving Gradient Estimation in Evolutionary Strategies With Past Descent Directions

no code implementations11 Oct 2019 Florian Meier, Asier Mujika, Marcelo Matheus Gauy, Angelika Steger

Finally, we evaluate our approach empirically on MNIST and reinforcement learning tasks and show that it considerably improves the gradient estimation of ES at no extra computational cost.

reinforcement-learning Reinforcement Learning +1

Decoupling Hierarchical Recurrent Neural Networks With Locally Computable Losses

no code implementations11 Oct 2019 Asier Mujika, Felix Weissenberger, Angelika Steger

Learning long-term dependencies is a key long-standing challenge of recurrent neural networks (RNNs).

Optimal Kronecker-Sum Approximation of Real Time Recurrent Learning

1 code implementation11 Feb 2019 Frederik Benzing, Marcelo Matheus Gauy, Asier Mujika, Anders Martinsson, Angelika Steger

In contrast, the online training algorithm Real Time Recurrent Learning (RTRL) provides untruncated gradients, with the disadvantage of impractically large computational costs.

Memorization

The linear hidden subset problem for the (1+1) EA with scheduled and adaptive mutation rates

no code implementations16 Aug 2018 Hafsteinn Einarsson, Marcelo Matheus Gauy, Johannes Lengler, Florian Meier, Asier Mujika, Angelika Steger, Felix Weissenberger

For the first setup, we give a schedule that achieves a runtime of $(1\pm o(1))\beta n \ln n$, where $\beta \approx 3. 552$, which is an asymptotic improvement over the runtime of the static setup.

Evolutionary Algorithms

Approximating Real-Time Recurrent Learning with Random Kronecker Factors

no code implementations NeurIPS 2018 Asier Mujika, Florian Meier, Angelika Steger

Despite all the impressive advances of recurrent neural networks, sequential data is still in need of better modelling.

Memorization

Fast-Slow Recurrent Neural Networks

1 code implementation NeurIPS 2017 Asier Mujika, Florian Meier, Angelika Steger

Processing sequential data of variable length is a major challenge in a wide range of applications, such as speech recognition, language modeling, generative image modeling and machine translation.

Language Modelling Machine Translation +2

Drift Analysis and Evolutionary Algorithms Revisited

no code implementations10 Aug 2016 Johannes Lengler, Angelika Steger

One of the easiest randomized greedy optimization algorithms is the following evolutionary algorithm which aims at maximizing a boolean function $f:\{0, 1\}^n \to {\mathbb R}$.

Evolutionary Algorithms

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