This is the first in a pair of papers developing a framework for the
application of logarithmic structures in the study of singular curves of genus
. We construct
a smooth and proper moduli space dominating the main component of Kontsevich’s space of
stable genus
maps to projective space. A variation on this theme furnishes a modular interpretation
for Vakil and Zinger’s famous desingularization of the Kontsevich space of maps in genus
. Our
methods also lead to smooth and proper moduli spaces of pointed genus
quasimaps
to projective space. Finally, we present an application to the log minimal model program
for
.
We construct explicit factorizations of the rational maps among Smyth’s modular
compactifications of pointed elliptic curves.
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