Figure 3
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Top: example of a PUFEM triangular element. Plane wave basis are associated with vertices j = 1, 2 and 3 with Q 1 = Q 2 = 6 and Q 3 = 5. The element geometry is described using quadratic shape functions including edge nodes 4, 5 and 6. Bottom: triangular element in the PML region sharing an edge with the outer boundary x = L x .
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