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Hashed dynamic determinants for convex hulls

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We propose and implement in C++ the hashed dynamic determinants scheme.
This consists of efficient implementations of dynamic determinant algorithms and a hash table that stores
intermediate results (matrices and determinants) in order to be used in subsequent steps of the algorithm.

Related papers:
V.Fisikopoulos, L.Peñaranda.
Faster Geometric Algorithms via Dynamic Determinant Computation.
In Algorithms – ESA 2012, Lecture Notes in Computer Science Volume 7501, 2012, pp 443-454.

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