Geodesic
Deformations of instanton surfaces
Izvestiya. Mathematics , Tome 38 (1992) no. 2, pp. 313-331.

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A solution is given for the problem of determining smoothness invariants on an algebraic surface from a nonsmooth compact moduli space of instantons. For this a study is made of the deformation of the instanton surface. The results are used to distinguish smoothness on certain algebraic surfaces. 
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V. Ya. Pidstrigach. Deformations of instanton surfaces. Izvestiya. Mathematics , Tome 38 (1992) no. 2, pp. 313-331. http://geodesic.mathdoc.fr/item/IM2_1992_38_2_a4/

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