This paper focuses on the compressed sensing
$\ell_{1-2}$-minimization problem and develops new
bounds on cumulative coherence $\mu_1(s)$. We point
out that if cumulative coherence $\mu_1(s-1)$ and
$\mu_1(2s-1)$ satisfy
$(

This paper focuses on the compressed sensing
$\ell_{1-2}$-minimization problem and develops new
bounds on cumulative coherence $\mu_1(s)$. We point
out that if cumulative coherence $\mu_1(s-1)$ and
$\mu_1(2s-1)$ satisfy
$(