kshitij12345 commented on issue #15515: [MXNET-978] Higher Order Gradient Support `arcsin`, `arccos`. URL: https://github.com/apache/incubator-mxnet/pull/15515#issuecomment-511179949 Do note that, the other alternative is `2.*(array - np.min(array))/np.ptp(array)-1`, but we will need to handle the case with array of one element array.
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