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math.AG2024
Positive Moments Forever: Undecidable and Decidable Cases
Gemma De les Coves, Joshua Graf, Andreas Klingler +1
We investigate the generalized moment membership problem for matrices, a formulation equivalent to Skolem's problem for linear recurrence sequences. We show decidability for orthog…
math.AG2020
Approximate Completely Positive Semidefinite Factorizations and their Ranks
Paria Abbasi, Andreas Klingler, Tim Netzer
In this paper we show the existence of approximate completely positive semidefinite (cpsd) factorizations with a cpsd-rank bounded above (almost) independently from the cpsd-rank o…