21 citations · 84 across the 24 of their papers we have counts for
4 papers · 1 filter
The Real Graded Brauer group
Max Karoubi, Charles Weibel
We introduce a version of the Brauer--Wall group for Real vector bundles of algebras (in the sense of Atiyah), and compare it to the topological analogue of the Witt group. For var…
On the covering type of a space
Max Karoubi, Charles Weibel
We introduce the notion of the "covering type" of a space, which is more subtle that the notion of Lusternik Schnirelman category. It measures the complexity of a space which arise…
Quasi-commutative cochains in algebraic topology
Max Karoubi
We introduce a new algebraic concept of an algebra which is "almost" commutative (more precisely "quasi-commutative differential graded algebra" or ADGQ, in French). We associate t…
Twisted Kähler differential forms
Max Karoubi, Mariano Suarez-Alvarez
We construct a braided structure on the algebra of Kähler differential forms of a commutative algebra twisted by an endomorphism. This generalises the construction done in M. Karou…