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math.CO2021
Hadamard Matrix Torsion
Davide Lofano, Frank H. Lutz
We construct a series HMT of -dimensional simplicial complexes with torsion HMT$(n))=(\mathbb{Z}_2)^{{k}\choose{1}} \times (\mathbb{Z}_4)^{{k}\choose{2}} \times \cdot…
math.CO2019
The worst way to collapse a simplex
Davide Lofano, Andrew Newman
In general a contractible complex need not be collapsible. Moreover, there exist complexes which are collapsible but even so admit a collapsing sequence where one "gets stuck", tha…