Abstract
Consider the diagram
where Y is a germ of a 1-parameter flat1 family of algebraic varieties with dim Y≥3, such that the fibres Y t are reduced irreducible for t#0, and the central fibre Y0 splits into a few reduced components. Further on, X is a germ of a 1-parameter flat family of subvarieties X t у Yt for t ∈ (ℂ, 0). When considering the diagram (2.1) over the reals, we assume that X and Y are equipped with a complex conjugation which commutes with the projections, and we restrict the parameter range to t ∈ [0, τ), τ>0, taking the respective preimages in X and Y.
The flatness over a smooth one-dimensional base means that the projection is a proper analytic surjection.
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© 2009 Birkhäuser Verlag AG
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(2009). Patchworking of algebraic varieties. In: Tropical Algebraic Geometry. Oberwolfach Seminars, vol 35. Birkhäuser Basel. https://doi.org/10.1007/978-3-0346-0048-4_2
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DOI: https://doi.org/10.1007/978-3-0346-0048-4_2
Publisher Name: Birkhäuser Basel
Print ISBN: 978-3-0346-0047-7
Online ISBN: 978-3-0346-0048-4
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