Quasi-Weak equivalences in complicial exact categories, by Toshiro Hiranouchi and Satoshi Mochizuki

We introduce a notion of quasi-weak equivalences associated with weak-equivalences in an exact category. It gives us a delooping for (idempotent complete) exact categories and a condition that the negative K-group of an exact category becomes trivial.


Toshiro Hiranouchi <hira@hiroshima-u.ac.jp>
Satoshi Mochizuki <mochi81@hotmail.com>