Abstract
We enrich the discussion by taking into account less explored aspects of the set of continuous sub-actions, like the fact that, when considered up to constants, they form, in general, a non-compact subset of the quotient space. Such a property allows us to argue that, for Lipschitz continuous potentials that are not cohomologous to a constant, the separating sub-actions explicitly constructed in the previous chapter are quite particular and actually represent a small part of the whole set of Lipschitz continuous separating sub-actions.
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Bibliography
Livšic, A.N.: Homology properties of Y -systems. Mat. Zametki 10, 758–763 (1971)
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Garibaldi, E. (2017). Further Properties of Sub-actions. In: Ergodic Optimization in the Expanding Case. SpringerBriefs in Mathematics. Springer, Cham. https://doi.org/10.1007/978-3-319-66643-3_8
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DOI: https://doi.org/10.1007/978-3-319-66643-3_8
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