dorsal/arxiv
View SchemaPolynomially effective equidistribution for unipotent orbits in products of $\mathrm{SL}_2$ factors
| Authors | Elon Lindenstrauss, Amir Mohammadi, Lei Yang |
|---|---|
| Categories | |
| ArXiv ID | 2601.09983vv1 |
| URL | https://arxiv.org/abs/2601.09983 |
| License | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
Abstract
We sketch the proof of an effective equidistribution theorem for one-parameter unipotent subgroups in $S$-arithmetic quotients arising from $\mathbf K$-forms of $\mathrm{SL}_2^{\mathsf n}$ where $\mathbf K$ is a number field. This gives an effective version of equidistribution results of Ratner and Shah with a polynomial rate. The key new phenomenon is the existence of many intermediate groups between the $\mathrm{SL}_2$ containing our unipotent and the ambient group, which introduces potential local and global obstruction to equidistribution. Our approach relies on a Bourgain-type projection theorem in the presence of obstructions, together with a careful analysis of these obstructions.
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"abstract": "We sketch the proof of an effective equidistribution theorem for one-parameter unipotent subgroups in $S$-arithmetic quotients arising from $\\mathbf K$-forms of $\\mathrm{SL}_2^{\\mathsf n}$ where $\\mathbf K$ is a number field. This gives an effective version of equidistribution results of Ratner and Shah with a polynomial rate.\n The key new phenomenon is the existence of many intermediate groups between the $\\mathrm{SL}_2$ containing our unipotent and the ambient group, which introduces potential local and global obstruction to equidistribution.\n Our approach relies on a Bourgain-type projection theorem in the presence of obstructions, together with a careful analysis of these obstructions.",
"arxiv_id": "2601.09983",
"authors": [
"Elon Lindenstrauss",
"Amir Mohammadi",
"Lei Yang"
],
"categories": [
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"license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
"title": "Polynomially effective equidistribution for unipotent orbits in products of $\\mathrm{SL}_2$ factors",
"url": "https://arxiv.org/abs/2601.09983",
"version": "v1"
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