Lemma 2.2 . [05CF]
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Lemma 2.2.
Suppose we have a Gibbons-Hawking solution on , that is, a positive definite matrix function locally given by such that , which satisfy the distributional equation (10) in and, in addition, . Then the total space of the torus bundle can be compactified to the fibration such that is biholomorphic (in the orbifold sense) to in a manner which respects the map
In particular, such solution defines a complete Ricci-flat Kähler metric on the orbifold with the standard holomorphic volume form .