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History of tag 0923

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type time link
changed the statement 2017-06-05 ee5a3f9
Typo in more-algebra
changed the proof 2015-07-09 bfcfdf1
Work out the spectral sequence for principal ideal
changed the label to lemma-when-does-it-work 2015-07-09 cf91846
Rearrange material on derived completion
changed the statement and the proof 2015-07-09 cf91846
Rearrange material on derived completion
assigned tag 0923 2013-06-11 855db3b
Tags: Added new tags
created statement with label remark-when-does-it-work in more-algebra.tex 2013-05-17 60b8a3c
A curiosity

Detect whether an inverse system (A_n) is zero as a pro-object by
testing whether

\lim (A_n) = 0 and R^1\lim \bigoplus_i (A_n) = 0

Apply this to show that derived completion agrees with naive derived
completion for I = (f) if and only if the f-torsion is bounded.