Hyperkähler quotient explained
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
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
