I read about angular moment and linear moment but I don't know what "lifted action" means. Can you explain please?
Thanks. :)
2026-04-06 12:35:28.1775478928
What does "lifted action" mean?
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If you have a subgroup $\overline{M}$ of a quotient group $G/N$, the lift of $\overline{M}$ is a subgroup $M$ of $G$ such that the $\overline{M}$ is the image of $M$ under the projection homomorphism $G\rightarrow G/N$. (This is guaranteed to exist by the correspondence theorem.) So speaking of the lifted action of some group action implies that you are working with an element (or subgroup) of a factor group and you need to find the preimage of said element (or subgroup) in $G$.