List of radial stretchings implemented in lensmapping.
|1||f0 + f2|β|2/2||f0, f2|
|2||f0 + β02 f2 |β|2 [2 (β02+|β|2)]||f0, f2, β0|
|3||2f0/cosh(|β|/β0) − f0, with||f0, θE|
|4||a[1−cos(c |β|)]||a, c|
Notes. The first column id is used to select the source mapping when we instantiate the class sourcemapping (see in text for more details).
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