Author

D. Kriventsov

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Preprint Oct 2026

A nonlinear rod linkage model: zero-energy chains and continuum consistency

We study a discrete Lagrangian model for a one-dimensional chain of rigid rods coupled by elastic springs. We characterize the geometry of its zero-energy constraint and distinguish the spinner and flipper regimes. Under graph-type hypotheses, selected zero-energy chains converge, after rescaling, to trajectories of an...

D. Kriventsov, P. LeFloch · 0 citations

Preprint Oct 2026

A complete classification of singularities for radial solutions of the Stefan problem

We investigate singularities of radial solutions of the classical two-phase and one-phase Stefan problem. In a remarkable result, M.A. Herrero and J.J.L. Velazquez show existence of a solution such that the free boundary described by $g(t)$ satisfies in dimension $n\geq 3$ $$g(t)=c_n \sqrt{t} |\log t|^{\frac{-1}{n - 2}...

D. Kriventsov, Georg S. Weiss · 0 citations