issues about correspondSlover.py

[ZhileiChen99]

When I try to train the clean seen model on Modelnet40, the program has some errors, which appear in the line67, "assert torch.all(torch.det(R) > 0)", hope for your answer.

[ZhileiChen99]

I find some elements are nan in the return of torch.det(R)

[yao143]

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