Hi everyone,

You are all cordially invited to the AMLab Seminar on Thursday 10th September at 16:00 CEST on **Zoom**, where Elise van der Pol will give a talk titled “MDP Homomorphic Networks for Deep Reinforcement Learning “.

**Paper link:** https://arxiv.org/pdf/2006.16908.pdf
and https://arxiv.org/pdf/2002.11963.pdf

**Title: **MDP Homomorphic Networks for Deep Reinforcement Learning

**Abstract:** This talk discusses MDP homomorphic networks for deep reinforcement learning. MDP homomorphic networks are neural networks that are equivariant under symmetries in the joint state-action space of an MDP. Current approaches to deep reinforcement learning do not usually exploit knowledge about such structure. By building this prior knowledge into policy and value networks using an equivariance constraint, we can reduce the size of the solution space. We specifically focus on group-structured symmetries (invertible transformations). Additionally, we introduce an easy method for constructing equivariant network layers numerically, so the system designer need not solve the constraints by hand, as is typically done.

We construct MDP homomorphic MLPs and CNNs that are equivariant under either a group of reflections or rotations. We show that such networks converge faster than unstructured baselines on CartPole, a grid world and Pong.

To gain more deep insights on Deep Reinforcement Learning, feel free to join it and discuss! See you there!