Resolution graphs with 3 or 4 large nodes do not admit QHD smoothings; new combinatorial examples and a new proof of the Bhupal-Stipsicz theorem are given via reduction and enumeration.
Rational blowdowns and smoothings of surface singularities.Journal of Topology, 1(2):477–517, 2008
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Minimal rational graphs admitting a QHD smoothing
Resolution graphs with 3 or 4 large nodes do not admit QHD smoothings; new combinatorial examples and a new proof of the Bhupal-Stipsicz theorem are given via reduction and enumeration.