Not sure if here is the best place to ask :grinning: I’m learning FR method right now. The 1D formulation is fine for me, and tensorizing 1D Lagrange polynomials to 2D quadrilateral is straightforward. I find it a little difficult to understand how it works for triangle mesh. The Castonguay-Vincen…

Lagrange interpolation on triangles is no different from Lagrange interpolation on any space. A good reference for the theory on this is Theory and Practice of Finite Elements by Ern and Guermond, where they give enormous detail on Lagrange finite elements. But ultimately if you have a set of point…

On 2D Lagrange polynomials

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On 2D Lagrange polynomials

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