3 problems

Consider recovery from measurements for signals sparse in a redundant dictionary, in the setting where the current analysis incurs a logarithmic factor and the corresponding synthe…

Let $\bm{D}$ be the redundant dictionary and $\bm{z}$ a coefficient vector. In the relevant recovery analysis, approximate cancellations refer to cancellations affecting the entrie…

Let $L$ denote the parameter governing the current measurement bound and let $r=N/n$ be the redundancy of the dictionary, where $N$ is the number of dictionary elements and $n$ is…