Spectral gap and origami expanders
We construct the first measure-preserving affine actions with spectral gap on surfaces of arbitrary genus g>1. We achieve this by finding geometric representatives of multi-twists on origami surfaces. As a major application, we construct new expanders that are coarsely distinct from the classical...
| Main Authors: | , , , |
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| Format: | Internet publication |
| Language: | English |
| Published: |
2021
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