[QST] could you please help me understand how right_inverse work?

[jakedevtec]

What is your question?

I am trying to understand how the right_inverse works in the cute.
For example, https://github.com/NVIDIA/cutlass/blob/main/test/python/pycute/test_right_inverse.py#L88
The given input is Layout((2,4,6),(4,1,8)), I just couldn't figure out why the output is (4, 2, 6):(2, 1, 8).

Any help is appreciated!

[jakedevtec]

@ccecka you might be the right person who can help me?

[github-actions]

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[JieRen98]

It is about finding an inv_layout of layout, which satisfies layout(inv_layout(i)) = i

[manishucsd]

It will be helpful if we can document right_inverse and left_inverse in CuTe docs.
cc: @ccecka, @thakkarV

[irasin]

+1
we do need some docs about inverse and how they ared used in such as make_tiled_copy

[github-actions]

This issue has been labeled inactive-30d due to no recent activity in the past 30 days. Please close this issue if no further response or action is needed. Otherwise, please respond with a comment indicating any updates or changes to the original issue and/or confirm this issue still needs to be addressed. This issue will be labeled inactive-90d if there is no activity in the next 60 days.