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In mathematics, the hyperkähler quotient of a hyperkähler manifold acted on by a Lie group G is the quotient of a fiber of a hyperkähler moment map ${\displaystyle M\to {\mathfrak {g}}\otimes \mathbb {R} ^{3}}$ over a G-fixed point by the action of G. It was introduced by Nigel Hitchin, Anders Karlhede, Ulf Lindström, and Martin Roček in 1987. It is a hyperkähler analogue of the Kähler quotient.

References

• Hitchin, N. J.; Karlhede, A.; Lindström, U.; Roček, M. (1987), "Hyper-Kähler metrics and supersymmetry", Communications in Mathematical Physics, 108 (4): 535–589, doi:10.1007/BF01214418, ISSN 0010-3616, MR 0877637

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