Geodesic
Basic Objects for an Algebraic Homotopy Theory
Canadian journal of mathematics, Tome 24 (1972) no. 1, pp. 155-166

Voir la notice de l'article provenant de la source Cambridge University Press

The purposes of this paper are:(A) To show (§§ 1, 3, 5) that some of the usual notions of homotopy theory (sums, quotients, suspensions, loop functors) exist in the category of affine k-schemes where the affine rings are countably generated.(B) By example to demonstrate some of the more geometric relations between two objects of and their quotient or to study the algebraic suspension of one of them. See §§ 2.1, 2.2, 2.3, 3.(C) To prove (§4) that the algebraic suspension (in R/) of the n-sphere is homeomorphic to the n + 1 sphere for the usual topologies.(D) To show that the algebraic loop functor is right adjoint to the algebraic suspension functor (§5).These results can be viewed as a precursor of definitions for an algebraic homotopy theory from a “geometric” point of view (rather than a more algebraic standpoint employing Galois theory [5]). 
Cherenack, Paul. Basic Objects for an Algebraic Homotopy Theory. Canadian journal of mathematics, Tome 24 (1972) no. 1, pp. 155-166. doi: 10.4153/CJM-1972-014-6
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