Local third Chern class at isolated singularities of rank-two torsion-free sheaves on threefolds is deformation invariant, equals K-theoretic charge, and matches algebraic multiplicities for reflexive sheaves.
POINT SINGULARITIES AND LOCALc 3 35 Department of pure mathematics, University of W aterloo, Ontario, Canada, N2L 3G1 Email address:x67Chen@uwaterloo.ca
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Point Singularities and Local Third Chern Classes for Rank-Two Torsion-free Sheaves on Threefolds
Local third Chern class at isolated singularities of rank-two torsion-free sheaves on threefolds is deformation invariant, equals K-theoretic charge, and matches algebraic multiplicities for reflexive sheaves.