This chapter introduces the “Snake Lemma” and uses it to prove the statement that GΓ(t) = GΔ(t′) is “often” true. It first describes an indexing of the Γ preaccordion and of the Δ′ preaccordion; each indexing visits the episodes of the sequence in order from left to right, and after it is finished with an episode, it moves on to the next with no skipping around. Thus both indexings must be in the same episode. If there are resonances, there will be more than one possible pair of snakes. These are obtained through a process of specialization described in the proof. Any one of these pairs of snakes are considered canonical.
Princeton Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.
If you think you should have access to this title, please contact your librarian.
To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us.