### Special Issue on Algebra, Topology, and Dynamics in Interaction in honor of Dmitry Fuchs' 80th anniversary

The Guest Editors for this special issue are

Boris Khesin (University of Toronto, Canada)
Fyodor Malikov (University of Southern California, USA)
Valentin Ovsienko (University of Reims Champagne-Ardenne, France)
Sergei Tabachnikov (Pennsylvania State University, USA)

This issue is devoted to the 80th anniversary of Dmitry Fuchs.

Both original research articles and review papers are welcome.

There is no limit to the length of an article. Deadline for paper submission is September 30, 2019.

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

If you have your paper ready earlier than the deadline, we encourage you to send it now. The reviewing process starts once the paper is submitted and we will publish the paper as soon as the positive publication decision is made. The paper will be indexed in the relevant databases as soon as it is published without waiting for completion of the special issue.

Papers in this Issue:

Fun Problems in Geometry and Beyond
Boris Khesin and Serge Tabachnikov
SIGMA 15 (2019), 097, 21 pages   [ abs   pdf ]
Cohomology of Restricted Filiform Lie Algebras ${\mathfrak m}_2^\lambda(p)$
Tyler J. Evans and Alice Fialowski
SIGMA 15 (2019), 095, 11 pages   [ abs   pdf ]
Locally Nilpotent Derivations of Free Algebra of Rank Two
Vesselin Drensky and Leonid Makar-Limanov
SIGMA 15 (2019), 091, 10 pages   [ abs   pdf ]
Symplectic Frieze Patterns
Sophie Morier-Genoud
SIGMA 15 (2019), 089, 36 pages   [ abs   pdf ]
Twisted de Rham Complex on Line and Singular Vectors in $\widehat{{\mathfrak{sl}_2}}$ Verma Modules