The higher-limit map for abelian-group presentations
Let be an abelian group, and let be the category of presentations . Define the functor
by
The preceding natural monomorphism
Higher-limit conjecture. The above map is a natural isomorphism.
This asserts that the first higher inverse limit of the kernel functor on abelian-group presentations recovers the presented abelian group itself. The supplied text gives the natural monomorphism but does not provide evidence that the asserted isomorphism is known or resolved.
References
Primary source
Sergei O. Ivanov and Roman Mikhailov, “A higher limit approach to homology theories”, arXiv:1309.4920 (2013).
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