signtensors 0.1.0

Approximates tensors with sign frames.
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Signed cut decompositions

Low-level API to form matrix approximations of the form $$A \approx S C T\top = \sum_j c_j \mathbf{s}_j \mathbf{t}_j\top$$ where $S, T$ have entries in ${-1, 1}$ and $C$ is a diagonal matrix of real numbers.