Mathematics

Pure and applied mathematics including algebra, analysis, geometry, and combinatorics.

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Riemannian Multilevel Optimization Cuts Constrained Solver Time

Metric-compatible coarse corrections transfer gradients across manifolds, reducing iterations and CPU time on Kohn-Sham, Gross-Pitaevskii, and segmentation problems.

Jul 13, 20264 min2607.09517

Fisher Information Propagation Gets a Sharp Local Proof

A BBGKY argument couples entropy and Fisher-information inequalities to extend Lacker’s chaos method to smooth mean-field diffusions.

Jul 13, 20264 min2511.20078

Tensor Trains Cut Vlasov-Maxwell DG Cost

A modal DG solver stores the Vlasov distribution in tensor-train form, reaching 10⁴-scale compression on weakly nonlinear benchmarks.

Jul 13, 20265 min2607.08936

Divergence Estimators Get a Model-Invariant Robustness Rule

A Pareto-frontier analysis of GABD estimators identifies an extended $(\phi,\gamma)$ divergence that minimizes asymptotic variance at a chosen breakdown point.

Jul 13, 20264 min2607.04343

Hyperbolic Symmetry Settles Rigidity on Higher-Genus Surfaces

Lifting frameworks to the hyperbolic plane turns surface rigidity into a finite gain-graph condition with a 2|V|-edge tightness rule.

Jul 13, 20264 min2607.05023

Poincaré Bases Extend Gradient Sensitivity Analysis Beyond Polynomials

A Sturm--Liouville chaos basis makes derivative information orthogonal, improving Sobol index estimation on toy and flood models with small designs.

Jul 13, 20265 min2510.03056

Planar Poset Dimension Gets a Linear Obstruction Bound

A structural proof shows that every poset with a planar diagram has dimension at most 96 se(P) + 672.

Jul 13, 20264 min2607.09294

Contract MPC Enables Anytime Robot Traffic Coordination

Local trajectory contracts and safety envelopes let agents join or leave without central coordination, validated with up to eight race cars.

Jul 12, 20265 min2607.04215

Hamiltonian Digraphs Meet Two-Block Cycle Coloring Bound

A degeneracy argument for $C(k,\ell)$-free Hamiltonian digraphs proves $\chi(D) \leq k+\ell-1$ for $k+\ell \geq 6$, matching lower-bound examples.

Jul 12, 20264 min2607.08664

Sparse Certificates Turn Automated Bounds Into Simpler Proofs

Post-processing Lagrangian dual certificates with sparsification and SDP searches cuts an FGM N=3 active set from 16 multipliers to 6.

Jul 12, 20264 min2607.08753