Moonshine

JFR Duncan, MJ Griffin, K Ono - Research in the Mathematical Sciences, 2015 - Springer
Monstrous moonshine relates distinguished modular functions to the representation theory
of the Monster. The celebrated observations that 1= 1, 196884= 1+ 196883, 21493760= 1+ …

The moonshine module for Conway's group

JFR Duncan, S Mack-Crane - Forum of Mathematics, Sigma, 2015 - cambridge.org
We exhibit an action of Conway's group–the automorphism group of the Leech lattice–on a
distinguished super vertex operator algebra, and we prove that the associated graded trace …

Derived equivalences of K3 surfaces and twined elliptic genera

JFR Duncan, S Mack-Crane - Research in the Mathematical Sciences, 2016 - Springer
We use the unique canonically twisted module over a certain distinguished super vertex
operator algebra—the moonshine module for Conway's group—to attach a weak Jacobi …

Mock modular Mathieu moonshine modules

MCN Cheng, X Dong, JFR Duncan, S Harrison… - Research in the …, 2015 - Springer
We construct super vertex operator algebras which lead to modules for moonshine relations
connecting the four smaller sporadic simple Mathieu groups with distinguished mock …

Optimal mock Jacobi theta functions

MCN Cheng, JFR Duncan - Advances in Mathematics, 2020 - Elsevier
We classify the optimal mock Jacobi forms of weight one with rational coefficients. The space
they span is thirty-four-dimensional, and admits a distinguished basis parameterized by …

Traces of singular moduli and moonshine for the Thompson group

JA Harvey, BC Rayhaun - arxiv preprint arxiv:1504.08179, 2015 - arxiv.org
We describe a relationship between the representation theory of the Thompson sporadic
group and a weakly holomorphic modular form of weight one-half that appears in work of …

Landau-Ginzburg orbifolds and symmetries of K3 CFTs

MCN Cheng, F Ferrari, SM Harrison… - Journal of High Energy …, 2017 - Springer
A bstract Recent developments in the study of the moonshine phenomenon, including
umbral and Conway moonshine, suggest that it may play an important role in encoding the …

Two new avatars of moonshine for the Thompson group

JFR Duncan, JA Harvey, BC Rayhaun - arxiv preprint arxiv:2202.08277, 2022 - arxiv.org
The Thompson sporadic group admits special relationships to modular forms of two kinds.
On the one hand, last century's generalized moonshine for the monster equipped the …

Modular products and modules for finite groups

JFR Duncan, JA Harvey, BC Rayhaun - Algebras and Representation …, 2024 - Springer
Motivated by the appearance of penumbral moonshine, and by evidence that penumbral
moonshine enjoys an extensive relationship to generalized monstrous moonshine via …

From the Monster to Thompson to O'Nan

JFR Duncan - arxiv preprint arxiv:1909.09684, 2019 - arxiv.org
The commencement of monstrous moonshine is a connection between the largest sporadic
simple group---the monster---and complex elliptic curves. Here we explain how a closer look …