Geodesic
On affine morphisms of Hopf algebroids
Homology, homotopy, and applications, Tome 10 (2008) no. 1, pp. 53-95.

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

The paper considers the FPQC stacks which are associated to affine groupoid schemes. Using a formulation of a descent datum in terms of morphisms of affine groupoid schemes, explicit arguments are given which avoid appeal to the general principle of faithfully flat descent. This theory is applied to consider the notion of affine morphism.
DOI : 10.4310/HHA.2008.v10.n1.a4
Classification : 14A20, 14Lxx, 55N20, 55S05
Keywords: stack, Hopf algebroid, FPQC topology, affine morphism 
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     title = {On affine morphisms of {Hopf} algebroids},
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Geoffrey M. L. Powell. On affine morphisms of Hopf algebroids. Homology, homotopy, and applications, Tome 10 (2008) no. 1, pp. 53-95. doi : 10.4310/HHA.2008.v10.n1.a4. http://geodesic.mathdoc.fr/articles/10.4310/HHA.2008.v10.n1.a4/

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