- #1

CassiopeiaA

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**MJM' = J,**where

**M'**is transpose of

**M**. I understood the derivation given in the book. But my question is : isn't this condition true for any matrix

**M?**That is it doesn't matter whether we are talking about canonical transformation or not, any real matrix will satisfy the condition with the given

**J**. And if so then how do I check if the given transformation is canonical without using the Poisson Bracket condition?