Infinitesimal rigidity of symmetric bar-joint frameworks with fixed joints
Speaker:
Alison La Porta, Lancaster University
Date and Time:
Wednesday, July 12, 2023 - 12:00pm to 12:30pm
Location:
Fields Institute, Room 230
Abstract:
There has recently been significant interest in studying the impact of symmetry on the infinitesimal rigidity of (bar-joint) frameworks and related geometric constraint systems. A key result is that the rigidity matrix of a symmetric framework can be transformed into a block-decomposed form. For symmetric plane frameworks where the group acts freely on the vertex set, combinatorial characterisations for symmetry-generic infinitesimal rigidity have been established for the reflection group and a class of rotational groups. In this talk, I will show a generalisation of these results to the case where the framework is allowed to have fixed joints