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In mathematics, the spectral radius of a square matrix or a bounded linear operator is the supremum among the absolute values of the elements in its spectrum.

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Lower spectral radius of matrices with an invariant subspace

Let $\mathcal{A} = \{ A_1, \ldots, A_J, : A_j \in \mathbb{R}^{s\times s}\}$, and define the lower spectral radius (LSR) (aka joint subradius) by $LSR(\mathcal{A}) = \lim_{n\rightarrow\infty} \inf_{A_{ …
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