Geodesic
Self-duality equation: monodromy matrices and algebraic curves
Zapiski Nauchnykh Seminarov POMI, Differential geometry, Lie groups and mechanics. Part 14, Tome 215 (1994), pp. 197-216

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It is shown that the general local solution of the self-duality equation with $SU(1,1)$ and $SU(2)$ gauge groups is associated to some algebraic curve with moving branch points if related “monodromy matrix” is rational. The “multisoliton” solutions including monopoles and instantons correspond to the degenerated curves, when the branch cuts collapse to the double points. Bibliography: 17 titles. 
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     author = {D. A. Korotkin},
     title = {Self-duality equation: monodromy matrices and algebraic curves},
     journal = {Zapiski Nauchnykh Seminarov POMI},
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     url = {http://geodesic.mathdoc.fr/item/ZNSL_1994_215_a12/}
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D. A. Korotkin. Self-duality equation: monodromy matrices and algebraic curves. Zapiski Nauchnykh Seminarov POMI, Differential geometry, Lie groups and mechanics. Part 14, Tome 215 (1994), pp. 197-216. http://geodesic.mathdoc.fr/item/ZNSL_1994_215_a12/