Joseph Helfer

works on

2-topos 1 algebraic set theory 1 burali-forti paradox 1 category of classes 1 intuitionistic set theory 1 topos sketches 1

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math.AG2025

Severi curves of rational elliptic surfaces

FranÃ§ois Greer, Joseph Helfer, John Sheridan

We study Severi curves parametrizing rational bisections of elliptic fibrations associated to general pencils of plane cubics. Our main results show that these Severi curves are co…

math.AG2025

The integral chow ring of $M_{2}^{c t}$

Joseph Helfer, Eric Jovinelly, Eric Larson +2

This paper computes the integral Chow ring of the moduli space $M_{2}^{c t}$ of stable genus 2 curves of compact type. This is done by excising boundary strata from $M ˉ_{2}$ one-by-…

Severi curves of rational elliptic surfaces

The integral chow ring of M2ct​

The integral chow ring of $M_{2}^{c t}$