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Eivind Xu Djurhuus

Doctoral Research Fellow - Algebra, Geometry and Topology

Email eivindxd@math.uio.no

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Visiting address Moltke Moes vei 35 Niels Henrik Abels hus 0851 Oslo

Postal address Postboks 1053 Blindern 0316 Oslo

Other affiliations Faculty of Mathematics and Natural Sciences (Student)

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Publications

Djurhuus, Eivind Xu & Quick, Gereon (2026). Non-realizability of a triple Massey product for the algebra F<inf>2</inf>[a,b,c]/(ab, bc). New York journal of mathematics. 32, p. 349–360. Full text in Research Archive
Djurhuus, Eivind Xu & Quick, Gereon (2026). Non-realizability of a triple Massey product for the algebra F_2[a,b,c]/(ab,bc). New York journal of mathematics. 32, p. 349–360. Full text in Research Archive Show summary
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 cohomology of a differential graded algebra with non-vanishing triple Massey product. We prove this result by computing the graded Hochschild cohomology group which contains the potential obstruction to the vanishing.

Published Feb. 4, 2026 11:48 AM - Last modified Feb. 4, 2026 11:48 AM