Are there any plans to implement something like tensorflow's [tf.matrix_solve()](https://www.tensorflow.org/api_docs/python/tf/matrix_solve) and [tf.matrix_solve_ls()](https://www.tensorflow.org/api_docs/python/tf/matrix_solve_ls)? [torch.gels()](http://pytorch.org/docs/torch.html#torch.gels) exists but it doesn't have the backward step implemented.