sxjscience commented on issue #10002: General support of OPs for second-order 
gradient
URL: 
https://github.com/apache/incubator-mxnet/issues/10002#issuecomment-370981003
 
 
   @lightingghost @aidan-plenert-macdonald Would you have time to work on this? 
You may refer to the implementation of transpose, which uses itself as the 
backward OP 
https://github.com/apache/incubator-mxnet/blob/master/src/operator/tensor/matrix_op.cc#L315-L333.
 We can first work on supporting the easier cases like
   - [ ] unary operators, 
https://github.com/apache/incubator-mxnet/blob/master/src/operator/tensor/elemwise_unary_op_basic.cc
   - [ ] broadcasting and reduce, 
https://github.com/apache/incubator-mxnet/blob/master/src/operator/tensor/broadcast_reduce_op_value.cc
   - [ ] dot, batch_dot, 
https://github.com/apache/incubator-mxnet/blob/master/src/operator/tensor/dot.cc

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