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. 2019 May 29;9(5):190057. doi: 10.1098/rsob.190057

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© 2019 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 1. — (a) A curved sheet divided into 1536 warped triangular prisms (image reproduced from [18]). (b) Successive cutaway views of a solid sphere divided into 7120 tetrahedra.