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# Mathematical Research Letters

## Volume 27 (2020)

### Number 1

### Contents

On the Toda systems of VHS type

pp. 19-34

An equivariant Hilbert basis theorem

pp. 67-77

Ordinary $\mathrm{GL}_2 (F)$-representations in characteristic two via affine Deligne–Lusztig constructions

pp. 141-187

On a question of Dolgachev

pp. 281-299