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. Author manuscript; available in PMC: 2020 Aug 1.
Published in final edited form as: ACM Trans Math Softw. 2019 Aug;45(3):28. doi: 10.1145/3321515

Fig. 4.

Fig. 4.

Recursive insertion of tetrahedral simplex {1,2,3,4}. The order of node insertions is represented by the numbered red arrows. When each node is created, the black arrows to parent simplices are created by backfilling.