Volume 23: January 2021 - December 2021

Contents

On the deformation of the exceptional unimodal singularities	1
Naohiko Kasuya and Atsuhide Mori

Erratum for ``The sheaf α_X^•''	15
Daniel Barlet

New singularity invariants: the sheaf β_X^•''	19
Daniel Barlet

Homotopical Cancellation Theory for Gutierrez-Sotomayor Singular Flows	33
D.V.S. Lima, S. A. Raminelli, and K. A. de Rezende

On the comparison of nearby cycles via b-functions	92
Lei Wu

Brunella-Khanedani-Suwa variational residues for invariant currents	107
Mauricio Corrêa, Arturo Fernández-Pérez, Marcio G. Soares

Hard Lefschetz properties and distribution of spectra in singularity theory and Ehrhart theory	116
Antoine Douai

Covers of rational double points in mixed characteristic	127
J. Carvajal-Rojas, L. Ma, T. Polstra, K. Schwede, and K. Tucker

Orbifold splice quotients and log covers of surface pairs	151
Walter D. Neumann and Jonathan Wahl

Weighted homogeneous surface singularities homeomorphic to Brieskorn complete intersections	170
Tomohiro Okuma

Middle multiplicative convolution and hypergeometric equations	194
Nicolas Martin

What is the degree of a smooth hypersurface?	205
Antonio Lerario and Michele Stecconi

Zariski Invariant For Non-Isolated Separatrices Through Jacobian Curves of Pseudo-Cuspidal Dicritical Foliations	236
Oziel Gómez-Martínez