7 papers
-formality for pro-2 Demushkin groups
Ambrus Pál, Ambrus Pál, Gereon Quick
We study a weak form of formality for differential graded algebras, called -formality, and show that the differential graded -algebras of continuous cochains of…
Non-realizability of a triple Massey product for the algebra
Eivind Xu Djurhuus, Gereon Quick
We show that an often used example of a cohomology algebra with non-vanishing triple Massey product is intrinsically A_3-formal and therefore, in fact, cannot be realized as the co…
-formality for Demushkin groups at odd primes
Ambrus Pál, Gereon Quick
We study a weak form of formality for differential graded algebras, called -formality, for the cohomology of pro-p Demushkin groups at odd primes p. We show that the different…
Quasi-Boolean groups
Ambrus Pál, Gereon Quick
We give several equivalent characterisations of the maximal pro-2 quotients of real projective groups. In particular, for pro-2 real projective groups we provide a presentation in…
A note on the Thom morphism for the classifying space of certain Lie groups and gauge groups
Eiolf Kaspersen, Gereon Quick
We give a complete description of which non-torsion generators are not in the image of the Thom morphism from complex cobordism to integral cohomology for the classifying space of…
Real projective groups are formal
Ambrus Pál, Gereon Quick
We prove that the mod 2-cohomology algebras of real projective groups are formal. As a consequence we derive the Hopkins-Wickelgren formality and the strong Massey vanishing conjec…