hzfan commented on issue #15795: [Numpy] Differentiable svd
URL: https://github.com/apache/incubator-mxnet/pull/15795#issuecomment-521173432
   Just updated the code.
   The two main points updated:
   - reuse the diagonal results of (L^-1 dV VT) with an additional temp space 
of shape (m,)
   - avoid tempMr (which is of shape (m, n)) by joining blocks of dots.
   Now the total temp space used is (k, m, m) + (k, m)

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