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# Next steps

Trefethen {cite}`trefethenSpectralMethods2000` discusses techniques for tensor-product geometry, including eigenvalue problems and problems posed on a disk. Both Iserles {cite}`iserlesFirstCourse1996` and Morton and Mayers {cite}`mortonNumericalSolution2005` discuss finite differences at curved boundaries and present introductions to the finite element method in two dimensions.