most citedFIESTA5: numerical high-performance Feynman integral evaluation

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math.NA2022

Tensor rank bounds and explicit QTT representations for the inverses of circulant matrices

Lev Vysotsky, Maxim Rakhuba

In this paper, we are concerned with the inversion of circulant matrices and their quantized tensor-train (QTT) structure. In particular, we show that the inverse of a complex circ…