High-Order Integration on Regular Triangulated Manifolds Reaches Superalgebraic Approximation Rates Through Cubical Reparametrizations

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Contributors

Abstract

We present a novel methodology for deriving high-order volume elements (HOVE) designed for the integration of scalar functions over regular embedded manifolds. For constructing HOVE, we introduce square-squeezing—a homeomorphic multilinear hypercube-simplex transformation—reparametrizing an initial flat triangulation of the manifold to a cubical mesh. By employing square-squeezing, we approximate the integrand and the volume element for each hypercube domain of the reparametrized mesh through interpolation in Chebyshev–Lobatto grids. This strategy circumvents the Runge phenomenon, replacing the initial integral with a closed-form expression that can be precisely computed by high-order quadratures. We prove novel bounds of the integration error in terms of the 𝑟⁢th -order total variation of the integrand and the surface parametrization, predicting high algebraic approximation rates that scale solely with the interpolation degree and not, as is common, with the average simplex size. For smooth integrals whose total variation is constantly bounded with increasing 𝑟, the estimates prove the integration error to decrease even exponentially, while mesh refinements are limited to achieve algebraic rates. The resulting approximation power is demonstrated in several numerical experiments, particularly showcasing 𝑝-refinements to overcome the limitations of ℎ-refinements for highly varying smooth integrals.

Details

Original languageEnglish
Pages (from-to)2454-2482
JournalSIAM Journal on Numerical Analysis
Volume63
Issue number6
Early online date17 Dec 2025
Publication statusE-pub ahead of print - 17 Dec 2025
Peer-reviewedYes

Keywords