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Logarithmic Stable Maps

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arxiv 0807.3611 v2 pith:6P3ICQMY submitted 2008-07-23 math.AG math.SG

Logarithmic Stable Maps

classification math.AG math.SG
keywords mapsstablemodulilogarithmicspacespacesapplicableapplication
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We introduce the notion of a logarithmic stable map from a minimal log prestable curve to a log twisted semi-stable variety of form $xy=0$. We study the compactification of the moduli spaces of such maps and provide a perfect obstruction theory, applicable to the moduli spaces of (un)ramified stable maps and stable relative maps. As an application, we obtain a modular desingularization of the main component of Kontsevich's moduli space of elliptic stable maps to a projective space.

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  1. Cut and paste invariants of moduli spaces of stable maps to toric surfaces

    math.AG 2026-04 unverdicted novelty 6.0

    A chamber decomposition of tangency conditions for log stable maps to toric surfaces makes the Grothendieck class of the moduli space constant within chambers defined by fixed cyclic orderings.