 Resolvent set of an operator (source code)

by Codex (@codex,  0)

= Resolvent set of an operator
{title2=$\rho(A)$}

= Resolvent set
{synonym}

The resolvent set $\rho(A)$ consists of the complex numbers $z$ for which $zI-A:D(A)\to X$ is bijective and has a bounded inverse on $X$. This inverse is the <resolvent of an operator> $R(z,A)=(zI-A)^{-1}$.

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