activity
20102026
most citedCentral extensions of groups and adjoint groups of quandles

9 citations · 40 across the 33 of their papers we have counts for

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Showing 2017Show all

2 papers · 1 filter

math.GT2017★ 1 cited

Milnor invariants via unipotent Magnus embeddings

Hisatoshi Kodani, Takefumi Nosaka

We reconfigure the Milnor invariant of links in terms of central group extensions and unipotent Magnus embeddings. We also develop a diagrammatic computation of the invariant and c…

math.GT2017★ 1 cited

Cocycles of nilpotent quotients of free groups

Takefumi Nosaka

We focus on the cohomology of the -th nilpotent quotient of the free group, . This paper describes all the group 2-, 3-cocycles in terms of Massey products, and gives exp…