Geodesic
The ghost length and duality on the chain and cochain type levels
Homology, homotopy, and applications, Tome 18 (2016) no. 2, pp. 107-132.

Voir la notice de l'article provenant de la source International Press of Boston

We establish equalities between cochain and chain type levels of maps by making use of exact functors which connect appropriate derived and coderived categories. Relevant conditions for levels of maps to be finite are extracted from the equalities which we call duality on the levels. Moreover, we give a lower bound of the cochain type level of the diagonal map on the classifying space of a Lie group by considering the ghostness of a shriek map which appears in derived string topology. A variant of Koszul duality for a differential graded algebra is also discussed.
DOI : 10.4310/HHA.2016.v18.n2.a6
Classification : 13D07, 16E45, 18E30, 55R20
Keywords: level, differential graded algebra, triangulated category, Koszul duality 
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     author = {Katsuhiko Kuribayashi},
     title = {The ghost length and duality on the chain and cochain type levels},
     journal = {Homology, homotopy, and applications},
     pages = {107--132},
     publisher = {mathdoc},
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     number = {2},
     year = {2016},
     doi = {10.4310/HHA.2016.v18.n2.a6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4310/HHA.2016.v18.n2.a6/}
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Katsuhiko Kuribayashi. The ghost length and duality on the chain and cochain type levels. Homology, homotopy, and applications, Tome 18 (2016) no. 2, pp. 107-132. doi : 10.4310/HHA.2016.v18.n2.a6. http://geodesic.mathdoc.fr/articles/10.4310/HHA.2016.v18.n2.a6/

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