10 papers
Higher Massey Products in Demuškin Variations: Support Blocks, One-Relator Reduction, and a Five-Fold Vanishing Case
Marina Palaisti
Blumer and Quadrelli introduced a family of two-relator pro- groups obtained from a Demuškin group by imposing the commutativity of two generators which are not…
From Common-Slot Chains to Heisenberg Central Products over Global Fields
Marina Palaisti
Let be a global field and let be an odd prime with . Assuming first that , we record in a uniform global-field form the length-four…
Coordinate-Deletion Bundles from Composition Algebras: Hopf Defects, -Classes, and Real Projective Space
Marina Palaisti
Let \(D\in\{\C,\Hh,\Oct\}\) be a real composition division algebra of dimension \(d\in\{2,4,8\}\). We construct an explicit rank-\(d\) real vector bundle $ E_D\longrightarrow\RP^d$…
Ramification Subgroups of Knot Groups and their Profinite and Cohomological Structure
Marina Palaisti, Federico W. Pasini
We formalize a ramification theory for finite covers of knot exteriors. Given a knot group and a finite-index subgroup , we define meridional inertia subgroups $U\c…
Local Nonconvexity Indices for \(C^{1,1}\) Functions via Generalized Hessians
Marina Palaisti
Davydov, Moldavskaya, and Zitikis introduced local indices for quantifying the lack of convexity of a \(C^2\) function by measuring the nuclear-norm distance of its Hessian from th…
Marginal Persistence and Dynamic Copula Dependence in Sovereign Rating Migration Counts: A Discrete Interval-Likelihood MAGMAR Analysis
Marina Palaisti
This paper develops an observed-data likelihood for applying moving-aggregate modified autoregressive (MAGMAR) copula time-series models to discrete sovereign rating-migration coun…