Olivier Wittenberg
Speaker Affiliation: 
Université Sorbonne Paris Nord
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December 15, 2021

Zoom seminar Quadratic forms, Linear algebraic groups and Beyond, 8:30am


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(Joint work with Yonatan Harpaz.)  Let k be a field and p be a prime. According to a conjecture of Mináč and Tân, Massey products of n>2 classes in H^1(k,Z/pZ) should vanish whenever they are defined.  We establish this conjecture when k is a number field, for any n.  This constraint on the absolute Galois group of k was previously known to hold when n=3 and when n=4, p=2.

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