Ergodic theorems for set maps under weak forms of additivity
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866915120319299584 |
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| author | Briceño, Raimundo Iommi, Godofredo |
| author_facet | Briceño, Raimundo Iommi, Godofredo |
| contents | We investigate various relaxations of additivity for set maps into Banach spaces in the context of representations of amenable groups. Specifically, we establish conditions under which asymptotically additive and almost additive set maps are equivalent. For Banach lattices, we further show that these notions are related to a third weak form of additivity adapted to the order structure of the space. By utilizing these equivalences and reducing non-additive settings to the additive one by finding suitable additive realizations, we derive new non-additive ergodic theorems for amenable group representations into Banach spaces and streamline proofs of existing results in certain cases. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_14581 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ergodic theorems for set maps under weak forms of additivity Briceño, Raimundo Iommi, Godofredo Dynamical Systems Functional Analysis Primary 37A15, 46B42, 37A30, Secondary 37B02, 37A60, 37C85 We investigate various relaxations of additivity for set maps into Banach spaces in the context of representations of amenable groups. Specifically, we establish conditions under which asymptotically additive and almost additive set maps are equivalent. For Banach lattices, we further show that these notions are related to a third weak form of additivity adapted to the order structure of the space. By utilizing these equivalences and reducing non-additive settings to the additive one by finding suitable additive realizations, we derive new non-additive ergodic theorems for amenable group representations into Banach spaces and streamline proofs of existing results in certain cases. |
| title | Ergodic theorems for set maps under weak forms of additivity |
| topic | Dynamical Systems Functional Analysis Primary 37A15, 46B42, 37A30, Secondary 37B02, 37A60, 37C85 |
| url | https://arxiv.org/abs/2501.14581 |