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Hiroki Ishizaka

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Preprint Oct 2026

Anisotropic Lagrange interpolation on exact spherical triangles

We study linear Lagrange interpolation on exact geodesic spherical triangles obtained by radial projection of chordal triangles. Factorising the element map into an affine map and a radial correction separates chordal anisotropy from radial distortion. We derive exact identities for the surface measure, Dirichlet energ...

Hiroki Ishizaka · 0 citations

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