4 problems

Singular-vector bound conjecture. There exists a constant $c$ such that, for any $r$, the singular vectors $V$ of $D^{-r}$ satisfy

Sigma Delta effective oversampling conjecture. In compressed sensing, the error of Sigma Delta quantization should decay with the effective oversampling rate, rather than only with…

Let $q_n$ denote the discrete output sequence in the second-order $\Sigma\Delta$ recursion, and suppose the input has zero mean, sufficiently small amplitude, and sufficiently high…

Global attractivity conjecture. The origin is a globally attracting fixed point for this four-level asymmetric map. This would extend the class of asymmetric piecewise affine maps…