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.
Math.225(2021), no
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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.