Remark . [02HM]
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Remark.
The choice of perturbing the gravitational instanton of type by adding a linear function on can be regarded as an intermediate choice between resolving the singularity of by assuming all punctures have weight and the direct gluing of to . While not strictly necessary, the choice of perturbing by a linear function makes the exposition more uniform. In particular, the closed definite triple we will construct below fails to be hyperkähler by the same amount in a neighbourhood of and .