activity
20202026
most citedImpact Hamiltonian systems and polygonal billiards

2 citations · 2 across the 12 of their papers we have counts for

collaborators

15 papers

math.AP2026

Optimal regularity of optimal transport and degenerations of convex cones

Tristan C. Collins, Benjy Firester, Freid Tong

If is an optimal transport map between bounded convex domains and , we characterize the regularity/singularity dichotomy for at $(x,T(x)) \in \partial Ω\times \par…

math.AP2026

Singularity models for the Bernoulli free boundary problem from isoparametric hypersurfaces

Benjy Firester, Raphael Tsiamis, Zihui Zhao

We develop a general construction of homogeneous solutions to the Bernoulli free boundary problem, as well as general extremal domains on the sphere, from isoparametric foliations…

math.AP2026

Regularity of varifolds with bounded anisotropic first variation

Antonio De Rosa, Benjy Firester, Raphael Tsiamis

We prove an -regularity theorem for -varifolds with mean curvature in , , with respect to an anisotropic integrand satisfying a Michael-Simon inequality a…

math.DG2026

The anisotropic Michael-Simon inequality

Benjy Firester, Raphael Tsiamis

We prove a Michael-Simon inequality for varifolds of every dimension and codimension with respect to anisotropic energies. In particular, this resolves the problem for every convex…

math.DG2026

The anisotropic Michael-Simon inequality for surfaces in every codimension

Benjy Firester, Raphael Tsiamis

We prove a Michael-Simon inequality for -varifolds in , in arbitrary codimension, for anisotropies sufficiently close to the area functional. Building on the ideas…

math.DG2026

On Chern's conjecture for minimal submanifolds of the sphere

Benjy Firester, Raphael Tsiamis

A well-known conjecture of Chern, do Carmo, and Kobayashi asserts that, for , the scalar curvature of a closed, minimally immersed -submanifold of …

math.DG2026

Topology of minimal surfaces in the sphere from capillarity

Benjy Firester, Raphael Tsiamis

We present a general construction of embedded minimal and constant mean curvature surfaces in and one-phase free boundaries joined by a smooth interpolation by capil…

math.DG2026

New minimal surfaces in the sphere from capillary minimal cones

Benjy Firester, Raphael Tsiamis

For every , we construct minimal embeddings of in by doubling the links of free-boundary…

math.DG2026

Area-minimizing capillary cones

Benjy Firester, Raphael Tsiamis, Yipeng Wang

We construct non-flat minimal capillary cones with bi-orthogonal symmetry groups for any dimension and contact angle. These cones interpolate between rescalings of a singular solut…

math.AP2026

Stability inequalities for one-phase cones

Benjy Firester, Raphael Tsiamis, Yipeng Wang

We obtain strict stability inequalities for homogeneous solutions of the one-phase Bernoulli problem. We prove that in dimension and above, cohomogeneity one solutions with bi-…

math.AP2025

Homogeneous optimal transport maps between oblique cones

Tristan C. Collins, Benjy Firester, Freid Tong

We construct homogeneous optimal transport maps for the quadratic cost between convex cones with homogeneous, possibly degenerate, densities when the cones satisfy an obliqueness c…

math.AP2025

On a general class of free boundary Monge-Ampère equations

Tristan C. Collins, Benjy Firester

We solve a general class of free boundary Monge-Ampère equations given by \[ \det D^2u = λ\dfrac{f(-u)}{g(u^\star)h(\nabla u)}χ_{\{u<0\}} \; \text{ in } \mathbb{R}^n, \quad \nabla…

math.DG2025

Uniqueness of Cylindrical Tangent Cones

Benjy Firester, Raphael Tsiamis, Yipeng Wang

We show the uniqueness of the cylindrical tangent cone for area-minimizing hypersurfaces in , completing the u…

math.DG2022

Complete Calabi-Yau metrics from smoothing Calabi-Yau complete intersections

Benjy J. Firester

We construct complete Calabi-Yau metrics on non-compact manifolds that are smoothings of an initial complete intersection that is a Calabi-Yau cone, extending the work of Szé…

math.DS2020★ 2 cited

Impact Hamiltonian systems and polygonal billiards

L. Becker, S. Elliott, B. Firester +3

The dynamics of a beam held on a horizontal frame by springs and bouncing off a step is described by a separable two degrees of freedom Hamiltonian system with impacts that respect…