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Progress in Earth and Planetary Science
Fig. 1 | Progress in Earth and Planetary Science

Fig. 1

From: An introductory review of the thermal structure of subduction zones: II—numerical approach and validation

Fig. 1

a Illustration of the discretization of the 1D unit domain into four elements \(e_k\) with five nodal points \(x_i\). The two linear (P1) Lagrange shape functions \(\phi _i\) are shown that are nonzero in element \(e_2\). b Illustration of quadratic (P2) shape functions that are nonzero on element \(e_2\). The mesh still has four elements, but each element now has internal nodal points (indicated by open red circles)

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