Gereon Quick

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20242026

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math.GR2026

$A_{3}$ -formality for pro-2 Demushkin groups

Ambrus PÃ¡l, Ambrus Pál, Gereon Quick

We study a weak form of formality for differential graded algebras, called $A_{3}$ -formality, and show that the differential graded $F_{2}$ -algebras of continuous cochains of…

math.AT2026

Non-realizability of a triple Massey product for the algebra $F_{2} [a, b, c] / (ab, b c)$

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…

math.GR2026

$A_{3}$ -formality for Demushkin groups at odd primes

Ambrus PÃ¡l, Gereon Quick

We study a weak form of formality for differential graded algebras, called $A_{3}$ -formality, for the cohomology of pro-p Demushkin groups at odd primes p. We show that the different…

A3​-formality for pro-2 Demushkin groups

Non-realizability of a triple Massey product for the algebra F2​[a,b,c]/(ab,bc)

A3​-formality for Demushkin groups at odd primes

$A_{3}$ -formality for pro-2 Demushkin groups

Non-realizability of a triple Massey product for the algebra $F_{2} [a, b, c] / (ab, b c)$

$A_{3}$ -formality for Demushkin groups at odd primes