Search Results for author: Martin Biehl

Found 14 papers, 2 papers with code

Interpreting systems as solving POMDPs: a step towards a formal understanding of agency

no code implementations4 Sep 2022 Martin Biehl, Nathaniel Virgo

To do this we make use of the existing theory of partially observable Markov processes (POMDPs): we say that a system can be interpreted as a solution to a POMDP if it not only admits an interpretation map describing its beliefs about the hidden state of a POMDP but also takes actions that are optimal according to its belief state.

Interpreting Dynamical Systems as Bayesian Reasoners

no code implementations27 Dec 2021 Nathaniel Virgo, Martin Biehl, Simon McGregor

A central concept in active inference is that the internal states of a physical system parametrise probability measures over states of the external world.

Bayesian Inference

Experimental Evidence that Empowerment May Drive Exploration in Sparse-Reward Environments

no code implementations14 Jul 2021 Francesco Massari, Martin Biehl, Lisa Meeden, Ryota Kanai

A possible countermeasure is to endow RL agents with an intrinsic reward function, or 'intrinsic motivation', which rewards the agent based on certain features of the current sensor state.

Reinforcement Learning (RL)

Non-trivial informational closure of a Bayesian hyperparameter

no code implementations5 Oct 2020 Martin Biehl, Ryota Kanai

On the other hand we attempt to establish a connection between a quantity that is a feature of the interpretation of the hyperparameter as a model, namely the information gain, and the one-step pointwise NTIC which is a quantity that does not depend on this interpretation.

Causal blankets: Theory and algorithmic framework

no code implementations28 Aug 2020 Fernando E. Rosas, Pedro A. M. Mediano, Martin Biehl, Shamil Chandaria, Daniel Polani

We introduce a novel framework to identify perception-action loops (PALOs) directly from data based on the principles of computational mechanics.

A Technical Critique of Some Parts of the Free Energy Principle

no code implementations12 Jan 2020 Martin Biehl, Felix A. Pollock, Ryota Kanai

Additionally, we highlight that the variational densities presented in newer formulations of the free energy principle and lemma are parameterised by different variables than in older works, leading to a substantially different interpretation of the theory.

Bayesian Inference LEMMA

Geometry of Friston's active inference

no code implementations20 Nov 2018 Martin Biehl

We reconstruct Karl Friston's active inference and give a geometrical interpretation of it.

Expanding the Active Inference Landscape: More Intrinsic Motivations in the Perception-Action Loop

no code implementations21 Jun 2018 Martin Biehl, Christian Guckelsberger, Christoph Salge, Simón C. Smith, Daniel Polani

Research on intrinsic motivations may profit from an additional way to implement intrinsically motivated agents that also share the biological plausibility of active inference.

Being curious about the answers to questions: novelty search with learned attention

1 code implementation1 Jun 2018 Nicholas Guttenberg, Martin Biehl, Nathaniel Virgo, Ryota Kanai

We investigate the use of attentional neural network layers in order to learn a `behavior characterization' which can be used to drive novelty search and curiosity-based policies.

Learning body-affordances to simplify action spaces

1 code implementation15 Aug 2017 Nicholas Guttenberg, Martin Biehl, Ryota Kanai

Controlling embodied agents with many actuated degrees of freedom is a challenging task.

Action and perception for spatiotemporal patterns

no code implementations12 Jun 2017 Martin Biehl, Daniel Polani

This is a contribution to the formalization of the concept of agents in multivariate Markov chains.

Formal approaches to a definition of agents

no code implementations10 Apr 2017 Martin Biehl

We present a new measure that can be used to identify entities (called $\iota$-entities), some general requirements for entities in multivariate Markov chains, as well as formal definitions of actions and perceptions suitable for such entities.

Neural Coarse-Graining: Extracting slowly-varying latent degrees of freedom with neural networks

no code implementations1 Sep 2016 Nicholas Guttenberg, Martin Biehl, Ryota Kanai

We present a loss function for neural networks that encompasses an idea of trivial versus non-trivial predictions, such that the network jointly determines its own prediction goals and learns to satisfy them.

Time Series Time Series Analysis

Towards information based spatiotemporal patterns as a foundation for agent representation in dynamical systems

no code implementations18 May 2016 Martin Biehl, Takashi Ikegami, Daniel Polani

We present some arguments why existing methods for representing agents fall short in applications crucial to artificial life.

Artificial Life counterfactual

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