Convolution.backward

Undocumented in source. Be warned that the author may not have intended to support it.
  1. auto backward(Variable!(T, nbDims, HostStorage) gy)
    struct Convolution(T, size_t imDims, bool isConv = false, bool isNchw = true)
  2. auto backward(Variable!(T, nbDims, DeviceStorage) gy)

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