\contentsline {section}{\tocsection {}{1}{Introduction}}{1}
\contentsline {section}{\tocsection {}{2}{Integral models and reduction to the smooth case}}{3}
\contentsline {section}{\tocsection {}{3}{Atiyah classes and free curves}}{6}
\contentsline {section}{\tocsection {}{4}{Spaces of morphisms and comb constructions}}{7}
\contentsline {section}{\tocsection {}{5}{Proof of the smooth case}}{13}
\contentsline {section}{\tocsection {}{}{References}}{15}