Multiplication of complex tensors

[jzazo]

Hi! I was trying to perform some operations with your package, but I could not figure out element-wise multiplication.

Suppose the following code:

import torch
from pytorch_complex_tensor import ComplexTensor

A = torch.randn(10, 4, 5, 3)
FA = torch.rfft(A, 2, onesided=False)  # get complex tensor from 2D rFFT
FA.shape  # torch.Size([10, 4, 5, 3, 2])
C = ComplexTensor(FA.transpose(4,3)) # tranpose last dimension to match input format
C.shape    # torch.Size([10, 4, 5, 1, 3])
CC = C * C
CC.shape  # torch.Size([20, 4, 5, 0, 3])

The last output is null. How should element-wise operation work? Thanks!