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math.GT2026
Bar cohomology of links: beyond Milnor invariants
Greg Friedman, Nir Gadish, Robin Koytcheff +2
We develop bar cohomology of link complements as an invariant of links in homology spheres. In this setting, bar cohomology is a Hopf algebra which is calculable using surfaces and…
math.AT2026
The transverse singular complex
Greg Friedman, Anibal M. Medina-Mardones, Dev Sinha
Let be a smooth manifold without boundary and let be a countable collection of manifolds with corners, each equipped with a smooth map to . We show that the si…