Yes, the two operations are equivalent. 

"torch.bmm" performs batch matrix multiplication of two tensors, while "einsum" is a more flexible way to perform tensor operations and can perform batch matrix multiplication by specifying the Einstein summation convention in the string argument. 

In this case, "b i j, b j d -> b i d" specifies that the batch dimensions ("b") are combined, and the resulting dimensions are "b", "i", and "d".
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