2 papers
math.AG2026
The motivic Lie algebra embeds into the cohomology of the general linear group
Francis Brown, Erik Panzer, Jean-Luc Portner
We show that the motivic Lie algebra of mixed Tate motives over embeds canonically into the unstable compactly-supported cohomology of locally symmetric spaces for $\m…
math.QA2026
Graph integrals, Feynman periods, and single-valued multiple zeta values
Jean-Luc Portner
The Borel classes generating the stable cohomology of the general linear group can be represented by invariant differential forms. It is known that pulling these forms back along a…