Note that it is a polysemous word.
Möbius functions are important functions in number theory and combinatorics
The concept called "Mobius transformation" in the competitive programming community, especially in connection with the inclusion-division principle, etc., has nothing to do with the former.
Pointing out that there is a swing in the meaning of the term "Mobius transformation" in the competitive programming community.
Fast Subset Convolution paper that is occasionally mentioned in the competitive programming community.
relevance - fast Möbius transformation
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