ABSTRACT

Objects such as ∂ ∂ z j = 1 2 ( ∂ ∂ x j − i ∂ ∂ y j ) https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315140445/fbe50be4-2923-45ad-961d-51ed68ffe025/content/equation160.tif"/> or d z j = d x j + i d y j https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315140445/fbe50be4-2923-45ad-961d-51ed68ffe025/content/equation161.tif"/>