Hi fellow mathematicians,
I'm just studying mumfords proof of the existence of a coarse modulispace for curves of genus $g$in his great GIT book. On page 102 (in the proof of proposition 5.2) he talks about two natural homomorphisms $h_1,h_2$. I thinking about this for quite a whole now, but I simply can't see, what exactly these morphisms do on the level of objects. Can those morphisms be written down exactly?
I would be very thankful for any hints & explanations.
Regards from Tuebingen