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Koh, Kim Jie (author), Toshniwal, D. (author), Cirak, Fehmi (author)Easy to construct and optimally convergent generalisations of B-splines to unstructured meshes are essential for the application of isogeometric analysis to domains with non-trivial topologies. Nonetheless, especially for hexahedral meshes, the construction of smooth and optimally convergent isogeometric analysis basis functions is still an...journal article 2022