4 papers · 1 filter
Wild Stacky Curves and Rings of Mod p Modular Forms
Andrew Kobin, David Zureick-Brown
We extend work of Voight and the second author to compute the log canonical ring of a wild stacky curve over a field of characteristic , which allows us to compute rings of…
Artin-Schreier-Witt Theory for Stacky Curves
Andrew Kobin
We extend our previous classification of stacky curves in positive characteristic using higher ramification data and Artin-Schreier-Witt theory. The main new technical tool introdu…
-Local Degree via Stacks
Andrew Kobin, Libby Taylor
We extend results of Kass--Wickelgren to define an Euler class for a non-orientable (or non-relatively orientable) vector bundle on a smooth scheme, valued in the Grothendieck--Wit…
Artin-Schreier Root Stacks
Andrew Kobin
We classify stacky curves in characteristic with cyclic stabilizers of order using higher ramification data. This approach replaces the local root stack structure of a…