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Displaying 61 – 80 of 92

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On rich monoids

Radovan Gregor (1975)

Commentationes Mathematicae Universitatis Carolinae

Recursive coalgebras of finitary functors

Jiří Adámek, Dominik Lücke, Stefan Milius (2007)

RAIRO - Theoretical Informatics and Applications

For finitary set functors preserving inverse images, recursive coalgebras A of Paul Taylor are proved to be precisely those for which the system described by A always halts in finitely many steps.

Sur l’homologie des groupes orthogonaux et symplectiques à coefficients tordus

Aurélien Djament, Christine Vespa (2010)

Annales scientifiques de l'École Normale Supérieure

On calcule dans cet article l’homologie stable des groupes orthogonaux et symplectiques sur un corps fini k à coefficients tordus par un endofoncteur usuel F des k -espaces vectoriels (puissance extérieure, symétrique, divisée...). Par homologie stable, on entend, pour tout entier naturel i , les colimites des espaces vectoriels H i ( O n , n ( k ) ; F ( k 2 n ) ) et H i ( Sp 2 n ( k ) ; F ( k 2 n ) ) — dans cette situation, la stabilisation (avec une borne explicite en fonction de i et F ) est un résultat classique de Charney. Tout d’abord, nous donnons un cadre...

Taylor towers for Γ -modules

Birgit Richter (2001)

Annales de l’institut Fourier

We consider Taylor approximation for functors from the small category of finite pointed sets Γ to modules and give an explicit description for the homology of the layers of the Taylor tower. These layers are shown to be fibrant objects in a suitable closed model category structure. Explicit calculations are presented in characteristic zero including an application to higher order Hochschild homology. A spectral sequence for the homology of the homotopy fibres of this approximation is provided.

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