Given a representation of a link group, we introduce a trilinear form as a topological invariant. We show that, if the link is either hyperbolic or a knot with the malnormal peripheral subgroup, then the trilinear form is equal to the pairing of the (twisted) triple cup product and the fundamental relative 3-class. We give some examples illustrating the main results.
"Twisted cohomology pairings of knots III; triple cup products." Hiroshima Math. J. 50 (2) 207 - 222, July 2020. https://doi.org/10.32917/hmj/1595901628