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Expanded degenerations and pairs

TitleExpanded degenerations and pairs
Publication TypeJournal Article
Year of Publication2013
AuthorsAbramovich, D, Cadman, C, Fantechi, B, Wise, J
JournalCommunications in Algebra. Volume 41, Issue 6, May 2013, Pages 2346-2386
KeywordsExpanded pairs

Since Jun Li's original definition, several other definitions of expanded
pairs and expanded degenerations have appeared in the literature. We explain
how these definitions are related and introduce several new variants and
perspectives. Among these are the twisted expansions used by Abramovich and
Fantechi as a basis for orbifold techniques in degeneation formulas.


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