Abstract
We establish sufficient conditions for the existence of invariant subspaces for operators on real Banach spaces, and we investigate the behaviour of operators without such subspaces. All proofs are elementary.
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Godefroy, G. Convex analysis and non-trivial invariant subspaces. Positivity 24, 369–372 (2020). https://doi.org/10.1007/s11117-019-00682-4
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DOI: https://doi.org/10.1007/s11117-019-00682-4