Special Issue on Geometry and Dynamics in memory of Will Merry

The Guest Editors for this special issue are

Paul Biran (ETH Zürich, Switzerland)
Jonny Evans (Lancaster University, UK)
Gabriel Paternain (University of Washington, USA)

This special issue is dedicated to the memory of Will Merry (1984–2022). Will made a wide range of important contributions to Floer theory, especially to Rabinowitz–Floer theory and to dynamical systems in the presence of a magnetic field; he was also an inspiring teacher, mentor and colleague. This special issue will allow some of those he inspired to celebrate his life and work by sharing their recent discoveries from across geometry and dynamics.

List of topics

• symplectic and contact geometry;
• differential geometry;
• Floer theory;
• dynamical systems.

There is no limit to the length of an article. Deadline for paper submission is January 31, 2026.

How to Submit an Article to the Issue.

All articles will go through the standard peer reviewing procedure of SIGMA.

Papers in this Issue:

Splitting Symplectic Monodromy

Ailsa Keating, Ivan Smith and Michael Wemyss
SIGMA 22 (2026), 080, 36 pages   [ abs   pdf ]

Symplectic Excision and Distance Rigidity

Yoel Groman
SIGMA 22 (2026), 066, 20 pages   [ abs   pdf ]

A Note on Somewhere Positive Loops of Contactomorphisms

Igor Uljarević
SIGMA 22 (2026), 051,   8 pages   [ abs   pdf ]

Finiteness of Totally Magnetic Hypersurfaces

James Marshall Reber and Ivo Terek
SIGMA 22 (2026), 043, 15 pages   [ abs   pdf ]

The Linearized Floer Equation in a Chart

Urs Frauenfelder and Joa Weber
SIGMA 22 (2026), 032, 38 pages   [ abs   pdf ]

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