Gershgorin circle theorem
= Gershgorin circle theorem
{c}
{wiki}
= Gershgorin disc theorem
{c}
{synonym}
Every eigenvalue of a complex matrix $A=(a_{ij})$ lies in at least one disk
$$
\left\{z:|z-a_{ii}|\leq\sum_{j\ne i}|a_{ij}|\right\}.
$$
= Gershgorin circle theorem
{c}
{wiki}
= Gershgorin disc theorem
{c}
{synonym}
Every eigenvalue of a complex matrix $A=(a_{ij})$ lies in at least one disk
$$
\left\{z:|z-a_{ii}|\leq\sum_{j\ne i}|a_{ij}|\right\}.
$$