WHEN ARE THERE ENOUGH PROJECTIVE PERVERSE SHEAVES?
Glasgow mathematical journal, Tome 64 (2022) no. 1, pp. 185-196
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Let X be a topologically stratified space, p be any perversity on X and k be a field. We show that the category of p-perverse sheaves on X, constructible with respect to the stratification and with coefficients in k, is equivalent to the category of finite-dimensional modules over a finite-dimensional algebra if and only if X has finitely many strata and the same holds for the category of local systems on each of these. The main component in the proof is a construction of projective covers for simple perverse sheaves.
CIPRIANI, ALESSIO; WOOLF, JON. WHEN ARE THERE ENOUGH PROJECTIVE PERVERSE SHEAVES?. Glasgow mathematical journal, Tome 64 (2022) no. 1, pp. 185-196. doi: 10.1017/S0017089521000021
@article{10_1017_S0017089521000021,
author = {CIPRIANI, ALESSIO and WOOLF, JON},
title = {WHEN {ARE} {THERE} {ENOUGH} {PROJECTIVE} {PERVERSE} {SHEAVES?}},
journal = {Glasgow mathematical journal},
pages = {185--196},
year = {2022},
volume = {64},
number = {1},
doi = {10.1017/S0017089521000021},
url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089521000021/}
}
TY - JOUR AU - CIPRIANI, ALESSIO AU - WOOLF, JON TI - WHEN ARE THERE ENOUGH PROJECTIVE PERVERSE SHEAVES? JO - Glasgow mathematical journal PY - 2022 SP - 185 EP - 196 VL - 64 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089521000021/ DO - 10.1017/S0017089521000021 ID - 10_1017_S0017089521000021 ER -
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